Okay. That first message is of concern, the second one isn't. Is there a crash log for PhotoStreamAgent in Console? There may be more than one.
There are many, but have turned off iCloud photos (wasnt intending for it to be on) and the every few minute report has gone. Will have to see if it becomes more stable.
The report is:
Process: PhotoStreamAgent [499]
Path: /Applications/iPhoto.app/Contents/Library/LoginItems/PhotoStreamAgent.app/Contents/MacOS/PhotoStreamAgent
Identifier: PhotoStreamAgent
Version: 2.7 (40.34)
Code Type: X86-64 (Native)
Parent Process: launchd [134]
User ID: 501
Date/Time: 2013-02-24 12:46:38.069 +0000
OS Version: Mac OS X 10.8.2 (12C60)
Report Version: 10
Crashed Thread: 0
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Application Specific Information:
dyld: launch, loading dependent libraries
Dyld Error Message:
Library not loaded: @rpath/CoreMediaStream.framework/Versions/A/CoreMediaStream
Referenced from: /Applications/iPhoto.app/Contents/Library/LoginItems/PhotoStreamAgent.app/Contents/MacOS/PhotoStreamAgent
Reason: no suitable image found. Did find:
/Applications/iPhoto.app/Contents/Library/LoginItems/PhotoStreamAgent.app/Contents/MacOS/../Frameworks/CoreMediaStream.framework/Versions/A/CoreMediaStream: unknown file type, first eight bytes: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Binary Images:
0x10e50f000 - 0x10e54aff7 com.apple.photostream-agent (2.7 - 40.34) <AC71D8F3-870D-309D-BD20-F073E341EC80> /Applications/iPhoto.app/Contents/Library/LoginItems/PhotoStreamAgent.app/Contents/MacOS/PhotoStreamAgent
0x10e56d000 - 0x10e576ff7 com.apple.PhotoFoundation (1.0 - 10.17) <C40F985F-9C0A-389A-9E21-684EB0A5B160> /Applications/iPhoto.app/Contents/Frameworks/PhotoFoundation.framework/Versions/A/PhotoFoundation
0x10e5ed000 - 0x10e707fff com.apple.iLifeSQLAccess (1.7.1 - 60.5) <1E1D3528-A309-363F-93AD-D2B5B1115DE6> /Applications/iPhoto.app/Contents/Frameworks/iLifeSQLAccess.framework/Versions/A/iLifeSQLAccess
0x10e773000 - 0x10e778fff com.apple.iLifePhotoStreamConfiguration (3.4 - 2.5) <906317D7-09FF-3B77-8F35-01BB74C0109C> /Applications/iPhoto.app/Contents/Frameworks/iLifePhotoStreamConfiguration.framework/Versions/A/iLifePhotoStreamConfiguration
0x7fff6e10f000 - 0x7fff6e14393f dyld (210.2.3) <A40597AA-5529-3337-8C09-D8A014EB1578> /usr/lib/dyld
0x7fff8c225000 - 0x7fff8ce52ff7 com.apple.AppKit (6.8 - 1187.34) <1FF64844-EB62-3F96-AED7-6525B7CCEC23> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
0x7fff8d085000 - 0x7fff8d0d6ff7 com.apple.SystemConfiguration (1.12.2 - 1.12.2) <E095637C-457F-3D8F-AE32-A032F9D5A46C> /System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration
0x7fff8d7c9000 - 0x7fff8da49ff7 com.apple.AOSKit (1.05 - 151) <A34E8584-797C-318F-9E25-937A710C68AB> /System/Library/PrivateFrameworks/AOSKit.framework/Versions/A/AOSKit
0x7fff8f02d000 - 0x7fff8f038ff7 com.apple.aps.framework (3.0 - 3.0) <11E1A5D1-F5E5-3228-8B6F-77EB36B5C248> /System/Library/PrivateFrameworks/ApplePushService.framework/Versions/A/ApplePushService
0x7fff93309000 - 0x7fff9332bff7 com.apple.AOSAccounts (1.1.2 - 1.1.94) <6D0ECB77-3081-3DC8-9B4F-20E5A1A09554> /System/Library/PrivateFrameworks/AOSAccounts.framework/Versions/A/AOSAccounts
0x7fff95db3000 - 0x7fff96083fff com.apple.security (7.0 - 55179.1) <639641EF-8156-3190-890C-1053658E044A> /System/Library/Frameworks/Security.framework/Versions/A/Security
0x7fff97076000 - 0x7fff973d2fff com.apple.Foundation (6.8 - 945.11) <A5D41956-A354-3ACC-9355-BE200072223B> /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation