Calendar

• Birthday calendars are not currently available via the icloud.com website or in Windows. They will be available in a future release.
• FIXED: The default calendar is still the On My iPhone calendar despite setting up an iCloud account during Setup Assistant. As a workaround, reset the default Calendar after finishing Setup Assistant in Settings > Mail, Contacts, Calendar > Default Calendar.
• FIXED: Pushing iCloud Calendar data is not working in iOS. To sync your iCloud Calendar, launch the Calendar app or refresh the calendars manually using the Calendars button in the top left corner.

Core Image

• Several filters have been added since beta 1.

GameKit

• Match data for turn based matches is currently limited to 4 KB of data.
• NEW: Events will be passed to the delegate whenever a turn is made on a match, instead of just when it becomes the local player's turn.
• FIXED: When logging in to Game Center, the password may clear and login may not complete. Trying a second time will succeed.
• FIXED: In this beta, GameKit Invites may fail. As a workaround, try restarting the device.

iBooks

• iBooks 1.2.2 may fail to display some text or images in books. Please update to iBooks 1.3 in the App Store.

iCloud Backup

• As this is beta software, it is recommended that you do not use the iCloud services to store any critical data or information. If you enable iCloud Backup, automatic backup with iTunes when syncing will be disabled. We also suggest that you manually back up your device with iTunes. Backups made with earlier versions of iOS 5 beta will soon become incompatible, and will no longer be available. It is bly advised you upgrade to this version of the iOS 5 beta in order to continue backing up your devices. If you encounter errors restoring from a backup, or enabling a backup more than one hour after signing into iCloud, try deleting your iCloud account from Settings and adding it back. If errors persist, please try erasing your device and initiating the restore again.