Here is the change log / Release Note: 
Mac OS X 10.6.3 build 10D522 Seed Note
Mac OS X Update 10.6.3 is an update to Mac OS X 10.6.
____________________________________________________________________________________
Known Issues
- Applications may not be updated if they had been moved from the default location.
- Displays Preferences profile may show duplicate entries.
- ITunes May Hang when playing a web stream.
- The ColorSync Utility Filters tab may cause unexpected results.
Focus Areas (Changes in 10D522):
Account Preferences
- Accounts Preferences Fixes an issue when there is more than one account.
Address Book
- Fixes an issue with updating when Duplicates Review cards.
- Resolves issues with importing vCards.
- Resolves an issue when resizing cards.
- Resolves finding people with birthdays via an automator action.
Address Book Framework
- Resolves crashes in Mail when using the Address Book Framework.
- Resolves the issue where the wrong mail name is displayed.
AppKit
- Resolves to copy and paste issue.
- Resolves an issue NSFileWrapper.
- Fixes some crashes AppKit.
- Resolves an issue autocorrect spelling.
- Improvements to spellchecking.
- Resolves some graphics corruption issues when converting to a TIFF to PICT.
AppleWWANSupport
- Resolves some crashes in WWANd.
- Resolves some issues when Establishing connections with a WWAN device.
Applescript
- Resolves a crash in AppleScript when running in 32-bit mode.
- Resolves an issue with BBEdit recording of scripts.
Apple Software Restore
- Resolves an Apple Software Restore crash.
ATS
- Resolves Font issues after logout or reboot.
CarbonCore
- Resolves an issue with applications with # or & symbols in its filename.
- Resolves coreservicesd crashes.
- Resolves TextEdit permissions issues.
- Performance improvements with save panels.
CFNetwork
- Addresses compatibility issues with Wiki Server.
- Resolves crashes related to canceling a request in progress.
- Cookie fixes to broken websites.
- Resolves Exchange account authentication issues.
ColorSync
- Resolves a crash when a PDF document uses DeviceRGB.
- Resolves an issue where selected with Color Displays Pref unexpectedly crashes.
configd
- Improvements to USB Ethernet adapter behavior.
CoreAudio
- Resolves issues with AudioUnit metering.
- Resolves crashes when opening some CoreAudio AUNetSend in 64-bit mode.
- Resolves some crashes in HTTP SpectralBandReplication when playing live stream.
CoreData
- Resolves CoreData-store model mismatch issues.
- Resolves crashes in GarageBand.
- Fixes an issue in MPEG surround handler.
Core Foundation
- Resolves some Photo Booth, iChat, and Safari crashes.
CoreMedia
- Resolves issues with audio streaming.
- Resolves a number of crashes in CoreMedia.
- Resolves some playability issues of movies in Safari.
- Addresses compatibility issues with MTS formatted files.
- Addresses compatibility issues with MPEG4 files with AC3 tracks.
- Resolve issues to export. M4v movies.
- Resolve screen recording issues.
- Fix issues with figplayL subtitle rendering.
- Fixes issue with an H264 decoder video_range bit.
- Resolves an image iMove through built-in iSight stuttering / tearing issue.
- Improvements to CoreMedioIO graph topology.
- Resolves some display resolution and screen recording issues.
CorePDF
- Performance improvements when opening large PDF files in Preview.
CoreText
- Resolves some crashes with iMovie in CoreText.
- Resolves some crashes with PhotoBooth in CoreText.
- Addresses issues with variation font support.
CoreServices, CFNetwork
- Resolves a crash in CoreServicesUIAgent.
- Resolves issue with Safari SSL certificates.
CoreVideo
- Resolves a crash when creating pixel buffers simultaneously.
- Resolves some crashes in CVPixelBuffer.
CUPS
- Resolves some cupsd crashes.
- Fixes an issue with the "Resume" button when printing.
- Resolves crashes some supply levels.
- Resolves some issues side-channel request.
Date & Time Prefs
- Resolves an issue with ticking clock after daylight savings.
DataDetectors
- Resolves some crashes in DataDetectors.
Desktop Services
- Resolves hangs with NSOpenPanel in Desktop Services.
- Resolves to Flash CS4 hang when clicking the "browse" button.
- Resolves some hangs and crashes in Finder and Folder Actions Setup.
- Resolves issues in the home folder Go To window of the open / save panel.
- Resolves issues last opened folder.
- Resolves issues Spotlight query.
- Time Machine search Resolves issues.
- Resolves issue with a file copy error -36.
- Resolves issue an error -47 when user is doing to move replace of a bundle.
- Resolves issues for UI layout language specific settings.
Application Dictionary
- Resolves some crashes when using Dictionary.
- Resolves some issues Dictionary Panel.
Directory Service
- Resolves deadlock issues.
Disk Management
- Resolves diskutil some errors.
- Resolve issues diskutil unmount.
Disk Utility
- Resolves issue with restoring disk image checksum.
- Resolves a crash in Disk Utility with a missing external drive.
Dock
- Resolves momentum scrolling issues.
- Resolves some dock crashes.
- Resolves some issues notification Exposé.
eap8021x
- Resolves an issue with auto-join network after sleeping EAP-FAST/WPA2.
FamilyControls
- Resolves issue to launch restriction.
- Resolves issue with Safari bookmark.
FileSync
- Fixes a number of crashes for Portable Home Directory users.
- Fixes an issue with Portable Home Directory on NetApp SMB.
- Fixes a performance issue with NFS logins.
- Resolves to SystemUIServer performance issue.
- Resolves to FileSyncAgent performance issue.
File Systems
- Fixes a corruption issue with m4a files.
Fonts, FontParser, PSFontSupport
- Resolves some crashes in FontParser.
- Fixes some font spacing issues.
- Improvements to embedded fonts and accented characters.
- Improvements to Traditional Chinese characters.
- Resolves some crashes in FontParser, PSFontSupport.
Foundation
- Resolves an issue with NSFileHandle.
GraphicsDrivers
- Resolves to panic in GraphicsDrivers.
HIServices
- Resolves crashes in HIServices.
- Improvements to GetIconFamilyData when accessing large icons.
- Resolves issues drag and drop.
HIToolbox
- Fixes an issue with horizontal slider thumb drawing.
- Resolves some crashes in HIToolbox.
- Resolves some issues incorrect blank menus.
- Resolves issues cocoa palette.
- Resolves issues with Dock Exposé.
- Resolves an issue with drag & drop between MLTE controls.
- Fixes issues candidate window.
iCal
- Resolves issues meeting location.
- Fixes to iCalServer issues.
- Improvements to performance on servers.
- Resolves meeting mismatch issues.
- Improvements to attendee availability issues.
- Resolves some issues syncing iCal.
- Fixes iCal changing timezone issues.
- Resolves an issue with saving events to Exchange calendars.
- Resolves some iCal crashes.
ImageCapture
- Resolves issues reading LX3. RW2 as raw.
ImageIO
- Fixes a crash in DVD Studio Pro libJPEG.dylib
Inkwell
- Improvements to Inkwell.
IOATAFamily
- Resolves some panics with ATA kexts.
IOFireWireSerialBusProtocolTransport
- Resolves DVD mounting issues with FireWire drives.
IOSCSIArchitechtureModeFamily
- Resolves crashes while accessing files on Xsan volumes.
Kernel
- Resolves kernel panics due to locked buffers.
launchd
- Resolves some crashes in launchd.
- Resolves a race condition that causes the Dock to appear unresponsive.
LaunchServices
- Improvements to CompositeIconRef.
Libc
- Resolves an xlocale crash in multithreaded applications.
LLVM
- Resolves segmentation faults.
- Resolves some compiler crashes.
- Improvements for OpenCL and OpenGL.
LoginWindow
- Performance improvements with loginwindow.
Mail
- Resolves some crashes in Mail
- Improvements to Exchange Web Services.
- Performance improvements to Mail, when deleting and adding To Dos.
- Resolves issues filtering junk folder.
- Resolves an issue when renaming a mailbox resorts it alphabetically.
- Improvements to Mail Notes.
mDNSResponder
- Improvements to mDNSResponder.
- Resolves a buffer overflow issue.
- Resolves to hang deadlock issue.
- Resolves some DNS issues.
- Resolves sleep / wake issues.
MediaKit
- Fixes a crash in MediaKit.
- Fixes a corruption issue when resizing partitions.
- Allow asr to resolve images with highly fragmented catalogs.
MeshKit
- MeshKit framework improvements.
Migration
- Cisco VPN Client Resolves issues.
MobileMe, MobileMe Sync Manager
- Resolves some issues with syncing MobleMe.
- Resolves excessive memory consumption.
- Resolves Mingle ISyncSessionCancelled failures.
- Performance improvements to MobileMe syncing.
NavigationServices
- Resolves a crash in Navigation dialog.
Networking
- Resolves some panics in networking.
- Resolves some Back to My Mac wake from sleep issues.
- Resolves some PPP crashes.
OpenCL
- Resolves OpenCL some compiler issues.
- Resolves OpenCL some conversion issues.
- Fixes some crashes OpenCL.
- Resolves some issues OpenCL Framework.
PDFKit
- Resolves issues hyperlinked text in Preview.
Photo Booth
- Resolves some issues when copying photos from Photo Booth.
- Resolves a Photo Booth crash.
Power Management
- Resolves some sleep / wake issues.
Printing
- Fixes a timestamp issue with supply levels in the Print window.
- Resolves some issues with printing setup print / fax devices.
- Improvements to printing memory of last printer used.
- Fixes some crashes in Printing.
python
- Resolves a crash in python.
QuartzComposer
- Resolves a crash in Mesh Filter.
- Resolves a performance issue in Quartz Composer.
QuickDraw
- Performance improvements when drawing short strings.
QuickTime Player
- Resolves some QuickTime Player crashes.
- Resolves screen recording issues.
- Resolves an issue HDCP audio movie.
- Resolves issue with filename.
- Fixes an issue when opening. Mov files in either QuickTime Player 7 or Quicktime Player X.
- Improvements to QuickTime Player movie actions.
- Resolves issues with AAC streams in the movie inspector window.
- Resolves an issue with subtitles movie when layers are flipped.
- Implemented some performance improvements to QuickTime.
- Resolves some issues when importing movies into iMovie Pro Res.
- Resolves issues with optimizing videos.
- Resolves some crashes QuickTime.
RemotePrefs
- Fixes an issue with 802.1X System Profile export.
Rosetta
- Resolves a crash in Rosetta.
- Fixes a memory corruption in Rosetta.
ScreenSaverModules
- Resolves some crashes in Screen Saver.
- Resolves some issues when using images with iPhoto Screen Saver.
Screen Sharing
- Resolves screen sharing some crashes.
- Fixes issue with screen sharing in View when the display is detached during an active session.
SecureTransport
- Resolves some thread safety issues so that SSL clients can function more reliably.
scriptDevTools
- Resolves a crash in scripting Bridge.
Simplified Chinese Input Method
- Improves frequency order of dictionary contents.
SMB
- Resolves an issue with saving files via SMB.
- Resolves issue with filename case.
- Resolves issue clear text password.
- Resolves SMB to hang when deleting folders.
Softwareupdate
- Resolves crashes in Software Update.
Spell Checker
- Improvements to automatic spell correction.
Spotlight
- Fixes some crashes in Spotlight.
- Performance improvements with Spotlight.
Sync Services Engine
- Resolves crashes in Sync Services.
- Resolves issue merge contact MobileMe.
- Improvements to iCal and MobileMe syncing.
system_cmds
- Resolves to login crash.
SystemUIServer
- Resolves issues at unmount sleep.
- Resolves SystemUIServer crashes.
SystemMigration
- Resolves to panic in System Migration.
TCIM
- Update to the latest versions for Chinese Word Dictionary.
tcsh
- Resolves to SIG_TERM issue.
Terminal
- Resolves a printing issue with Terminal.
TextEdit
- Resolves a crash when using NSAttrString.
TimeZoneData
- Update time zone data.
Traditional Chinese Input Method
- Fixes space issues with Traditional Chinese Input Method.
Voice Over
- Improvements to VoiceOver.
XType
- Resolves an issue when activating fonts.
- Resolves an issue when duplicate fonts exist on a system.
xnu
- Resolves some issues with writing data to an external USB drive formatted in FAT32.
- Resolves some NFS hangs when attempt to launch new applications.
- Resolves some kernel panics.
____________________________________________________________________________________
I m looking to buy a mac please answer the following:
My Questions:
1) Is speaker quality in 13inch Macbook pro same or better than 15 & 17 ?
2) Is the air vent(exit of hot air) placed bottom of the screen in a macbook?
3) Does a macbook pro heats up a lot ?
Thanx, Bye C ya. 
Mac OS X 10.6.3 build 10D522 Seed Note
Mac OS X Update 10.6.3 is an update to Mac OS X 10.6.
____________________________________________________________________________________
Known Issues
- Applications may not be updated if they had been moved from the default location.
- Displays Preferences profile may show duplicate entries.
- ITunes May Hang when playing a web stream.
- The ColorSync Utility Filters tab may cause unexpected results.
Focus Areas (Changes in 10D522):
Account Preferences
- Accounts Preferences Fixes an issue when there is more than one account.
Address Book
- Fixes an issue with updating when Duplicates Review cards.
- Resolves issues with importing vCards.
- Resolves an issue when resizing cards.
- Resolves finding people with birthdays via an automator action.
Address Book Framework
- Resolves crashes in Mail when using the Address Book Framework.
- Resolves the issue where the wrong mail name is displayed.
AppKit
- Resolves to copy and paste issue.
- Resolves an issue NSFileWrapper.
- Fixes some crashes AppKit.
- Resolves an issue autocorrect spelling.
- Improvements to spellchecking.
- Resolves some graphics corruption issues when converting to a TIFF to PICT.
AppleWWANSupport
- Resolves some crashes in WWANd.
- Resolves some issues when Establishing connections with a WWAN device.
Applescript
- Resolves a crash in AppleScript when running in 32-bit mode.
- Resolves an issue with BBEdit recording of scripts.
Apple Software Restore
- Resolves an Apple Software Restore crash.
ATS
- Resolves Font issues after logout or reboot.
CarbonCore
- Resolves an issue with applications with # or & symbols in its filename.
- Resolves coreservicesd crashes.
- Resolves TextEdit permissions issues.
- Performance improvements with save panels.
CFNetwork
- Addresses compatibility issues with Wiki Server.
- Resolves crashes related to canceling a request in progress.
- Cookie fixes to broken websites.
- Resolves Exchange account authentication issues.
ColorSync
- Resolves a crash when a PDF document uses DeviceRGB.
- Resolves an issue where selected with Color Displays Pref unexpectedly crashes.
configd
- Improvements to USB Ethernet adapter behavior.
CoreAudio
- Resolves issues with AudioUnit metering.
- Resolves crashes when opening some CoreAudio AUNetSend in 64-bit mode.
- Resolves some crashes in HTTP SpectralBandReplication when playing live stream.
CoreData
- Resolves CoreData-store model mismatch issues.
- Resolves crashes in GarageBand.
- Fixes an issue in MPEG surround handler.
Core Foundation
- Resolves some Photo Booth, iChat, and Safari crashes.
CoreMedia
- Resolves issues with audio streaming.
- Resolves a number of crashes in CoreMedia.
- Resolves some playability issues of movies in Safari.
- Addresses compatibility issues with MTS formatted files.
- Addresses compatibility issues with MPEG4 files with AC3 tracks.
- Resolve issues to export. M4v movies.
- Resolve screen recording issues.
- Fix issues with figplayL subtitle rendering.
- Fixes issue with an H264 decoder video_range bit.
- Resolves an image iMove through built-in iSight stuttering / tearing issue.
- Improvements to CoreMedioIO graph topology.
- Resolves some display resolution and screen recording issues.
CorePDF
- Performance improvements when opening large PDF files in Preview.
CoreText
- Resolves some crashes with iMovie in CoreText.
- Resolves some crashes with PhotoBooth in CoreText.
- Addresses issues with variation font support.
CoreServices, CFNetwork
- Resolves a crash in CoreServicesUIAgent.
- Resolves issue with Safari SSL certificates.
CoreVideo
- Resolves a crash when creating pixel buffers simultaneously.
- Resolves some crashes in CVPixelBuffer.
CUPS
- Resolves some cupsd crashes.
- Fixes an issue with the "Resume" button when printing.
- Resolves crashes some supply levels.
- Resolves some issues side-channel request.
Date & Time Prefs
- Resolves an issue with ticking clock after daylight savings.
DataDetectors
- Resolves some crashes in DataDetectors.
Desktop Services
- Resolves hangs with NSOpenPanel in Desktop Services.
- Resolves to Flash CS4 hang when clicking the "browse" button.
- Resolves some hangs and crashes in Finder and Folder Actions Setup.
- Resolves issues in the home folder Go To window of the open / save panel.
- Resolves issues last opened folder.
- Resolves issues Spotlight query.
- Time Machine search Resolves issues.
- Resolves issue with a file copy error -36.
- Resolves issue an error -47 when user is doing to move replace of a bundle.
- Resolves issues for UI layout language specific settings.
Application Dictionary
- Resolves some crashes when using Dictionary.
- Resolves some issues Dictionary Panel.
Directory Service
- Resolves deadlock issues.
Disk Management
- Resolves diskutil some errors.
- Resolve issues diskutil unmount.
Disk Utility
- Resolves issue with restoring disk image checksum.
- Resolves a crash in Disk Utility with a missing external drive.
Dock
- Resolves momentum scrolling issues.
- Resolves some dock crashes.
- Resolves some issues notification Exposé.
eap8021x
- Resolves an issue with auto-join network after sleeping EAP-FAST/WPA2.
FamilyControls
- Resolves issue to launch restriction.
- Resolves issue with Safari bookmark.
FileSync
- Fixes a number of crashes for Portable Home Directory users.
- Fixes an issue with Portable Home Directory on NetApp SMB.
- Fixes a performance issue with NFS logins.
- Resolves to SystemUIServer performance issue.
- Resolves to FileSyncAgent performance issue.
File Systems
- Fixes a corruption issue with m4a files.
Fonts, FontParser, PSFontSupport
- Resolves some crashes in FontParser.
- Fixes some font spacing issues.
- Improvements to embedded fonts and accented characters.
- Improvements to Traditional Chinese characters.
- Resolves some crashes in FontParser, PSFontSupport.
Foundation
- Resolves an issue with NSFileHandle.
GraphicsDrivers
- Resolves to panic in GraphicsDrivers.
HIServices
- Resolves crashes in HIServices.
- Improvements to GetIconFamilyData when accessing large icons.
- Resolves issues drag and drop.
HIToolbox
- Fixes an issue with horizontal slider thumb drawing.
- Resolves some crashes in HIToolbox.
- Resolves some issues incorrect blank menus.
- Resolves issues cocoa palette.
- Resolves issues with Dock Exposé.
- Resolves an issue with drag & drop between MLTE controls.
- Fixes issues candidate window.
iCal
- Resolves issues meeting location.
- Fixes to iCalServer issues.
- Improvements to performance on servers.
- Resolves meeting mismatch issues.
- Improvements to attendee availability issues.
- Resolves some issues syncing iCal.
- Fixes iCal changing timezone issues.
- Resolves an issue with saving events to Exchange calendars.
- Resolves some iCal crashes.
ImageCapture
- Resolves issues reading LX3. RW2 as raw.
ImageIO
- Fixes a crash in DVD Studio Pro libJPEG.dylib
Inkwell
- Improvements to Inkwell.
IOATAFamily
- Resolves some panics with ATA kexts.
IOFireWireSerialBusProtocolTransport
- Resolves DVD mounting issues with FireWire drives.
IOSCSIArchitechtureModeFamily
- Resolves crashes while accessing files on Xsan volumes.
Kernel
- Resolves kernel panics due to locked buffers.
launchd
- Resolves some crashes in launchd.
- Resolves a race condition that causes the Dock to appear unresponsive.
LaunchServices
- Improvements to CompositeIconRef.
Libc
- Resolves an xlocale crash in multithreaded applications.
LLVM
- Resolves segmentation faults.
- Resolves some compiler crashes.
- Improvements for OpenCL and OpenGL.
LoginWindow
- Performance improvements with loginwindow.
- Resolves some crashes in Mail
- Improvements to Exchange Web Services.
- Performance improvements to Mail, when deleting and adding To Dos.
- Resolves issues filtering junk folder.
- Resolves an issue when renaming a mailbox resorts it alphabetically.
- Improvements to Mail Notes.
mDNSResponder
- Improvements to mDNSResponder.
- Resolves a buffer overflow issue.
- Resolves to hang deadlock issue.
- Resolves some DNS issues.
- Resolves sleep / wake issues.
MediaKit
- Fixes a crash in MediaKit.
- Fixes a corruption issue when resizing partitions.
- Allow asr to resolve images with highly fragmented catalogs.
MeshKit
- MeshKit framework improvements.
Migration
- Cisco VPN Client Resolves issues.
MobileMe, MobileMe Sync Manager
- Resolves some issues with syncing MobleMe.
- Resolves excessive memory consumption.
- Resolves Mingle ISyncSessionCancelled failures.
- Performance improvements to MobileMe syncing.
NavigationServices
- Resolves a crash in Navigation dialog.
Networking
- Resolves some panics in networking.
- Resolves some Back to My Mac wake from sleep issues.
- Resolves some PPP crashes.
OpenCL
- Resolves OpenCL some compiler issues.
- Resolves OpenCL some conversion issues.
- Fixes some crashes OpenCL.
- Resolves some issues OpenCL Framework.
PDFKit
- Resolves issues hyperlinked text in Preview.
Photo Booth
- Resolves some issues when copying photos from Photo Booth.
- Resolves a Photo Booth crash.
Power Management
- Resolves some sleep / wake issues.
Printing
- Fixes a timestamp issue with supply levels in the Print window.
- Resolves some issues with printing setup print / fax devices.
- Improvements to printing memory of last printer used.
- Fixes some crashes in Printing.
python
- Resolves a crash in python.
QuartzComposer
- Resolves a crash in Mesh Filter.
- Resolves a performance issue in Quartz Composer.
QuickDraw
- Performance improvements when drawing short strings.
QuickTime Player
- Resolves some QuickTime Player crashes.
- Resolves screen recording issues.
- Resolves an issue HDCP audio movie.
- Resolves issue with filename.
- Fixes an issue when opening. Mov files in either QuickTime Player 7 or Quicktime Player X.
- Improvements to QuickTime Player movie actions.
- Resolves issues with AAC streams in the movie inspector window.
- Resolves an issue with subtitles movie when layers are flipped.
- Implemented some performance improvements to QuickTime.
- Resolves some issues when importing movies into iMovie Pro Res.
- Resolves issues with optimizing videos.
- Resolves some crashes QuickTime.
RemotePrefs
- Fixes an issue with 802.1X System Profile export.
Rosetta
- Resolves a crash in Rosetta.
- Fixes a memory corruption in Rosetta.
ScreenSaverModules
- Resolves some crashes in Screen Saver.
- Resolves some issues when using images with iPhoto Screen Saver.
Screen Sharing
- Resolves screen sharing some crashes.
- Fixes issue with screen sharing in View when the display is detached during an active session.
SecureTransport
- Resolves some thread safety issues so that SSL clients can function more reliably.
scriptDevTools
- Resolves a crash in scripting Bridge.
Simplified Chinese Input Method
- Improves frequency order of dictionary contents.
SMB
- Resolves an issue with saving files via SMB.
- Resolves issue with filename case.
- Resolves issue clear text password.
- Resolves SMB to hang when deleting folders.
Softwareupdate
- Resolves crashes in Software Update.
Spell Checker
- Improvements to automatic spell correction.
Spotlight
- Fixes some crashes in Spotlight.
- Performance improvements with Spotlight.
Sync Services Engine
- Resolves crashes in Sync Services.
- Resolves issue merge contact MobileMe.
- Improvements to iCal and MobileMe syncing.
system_cmds
- Resolves to login crash.
SystemUIServer
- Resolves issues at unmount sleep.
- Resolves SystemUIServer crashes.
SystemMigration
- Resolves to panic in System Migration.
TCIM
- Update to the latest versions for Chinese Word Dictionary.
tcsh
- Resolves to SIG_TERM issue.
Terminal
- Resolves a printing issue with Terminal.
TextEdit
- Resolves a crash when using NSAttrString.
TimeZoneData
- Update time zone data.
Traditional Chinese Input Method
- Fixes space issues with Traditional Chinese Input Method.
Voice Over
- Improvements to VoiceOver.
XType
- Resolves an issue when activating fonts.
- Resolves an issue when duplicate fonts exist on a system.
xnu
- Resolves some issues with writing data to an external USB drive formatted in FAT32.
- Resolves some NFS hangs when attempt to launch new applications.
- Resolves some kernel panics.
____________________________________________________________________________________
I m looking to buy a mac please answer the following:
My Questions:
1) Is speaker quality in 13inch Macbook pro same or better than 15 & 17 ?
2) Is the air vent(exit of hot air) placed bottom of the screen in a macbook?
3) Does a macbook pro heats up a lot ?
Thanx,
Bye C ya. 
