What releases notes did you see cause I have yet to see it
Notes and Known Issues
Installation
⁃ Network migration from earlier versions of OS X requires the Migration Update for Snow Leopard, Lion, or Mountain Lion.
⁃ Migration from Windows is not supported in Developer Preview 3.
⁃ Reinstalling Developer Preview 3 from the Recovery Partition is not supported. Developer Preview 3 can be reinstalled using a Time Machine backup or Target Disk Mode.
iCloud and iCloud Keychain
⁃ When enabling iCloud Keychain, a blank sheet may appear. Force Quit System Preferences and retry.
⁃ The Reset Keychain button in Account Details of the iCloud preferences pane is for testing purposes and will not be available in the final release.
⁃ First time iCloud setup may fail. Disabled services may be manually enabled in the iCloud preferences pane.
⁃ After upgrading to Developer Preview 3, iCloud Keychain will need to be re-enabled in the iCloud preferences pane.
⁃ iCloud Keychain in OS X Mavericks Developer Seed 3 is not backward compatible with iOS 7 Seed 2 and OS X Mavericks Developer Seed 2.
Third-Party Applications and Devices
⁃ Installation within a virtual machine is not supported for VMWare Fusion.
⁃ Adobe After Effects CS6 will not function correctly.
Other
⁃ Maps may display some graphical corruption when resizing windows or switching from standard to satellite view.
⁃ Screen recordings taken with Developer Preview 3 are not compatible with earlier releases of OS X.
⁃ The QuickTime Player progress bar may be nonfunctional when opening media that requires conversion prior to playback.
⁃ Aperture may exit unexpectedly when exporting an image while in full screen.
⁃ Moving a full-screen Aperture window to a secondary display may prevent the app window from being visible in subsequent attempts to use full screen.
⁃ When saving from Photoshop, Save As may not respect selected filetype.
⁃ Fusion Drive volumes created with Developer Preview 3 are not compatible with OS X version 10.8.4 or earlier.
⁃ Developer Preview 3 includes OpenSSH 6.2p2.