iCloud Storage

• During the iOS 5 beta period, any documents stored on the servers might be purged periodically before GM. Therefore, it is highly recommended that you do not store any critical documents or information on the servers.
• If your application is using the NSMetadataQuery class, you must set a predicate, even though the predicate itself is ignored.
• The Foundation framework doesn't include the team ID when looking for an app's mobile documents container. The Team ID must be included at the beginning of the identifier string passed to theURLForUbiquityContainerIdentifier: method.
• In this beta, the setSortDescriptors: method of NSMetadataQuery is not supported.
• In this beta, if you want to use iCloud, you have to manually specify various container identifiers (your application's Display set) within an Entitlements file for both of your Mac OS X and iOS projects.
• There are issues using the Cloud Storage document API in conjunction with protected data which can lead to data corruption.
• In this beta, document-based applications cannot always detect when files change, move, or are deleted out from underneath them.
• NEW: In this beta, file presenters (objects that adopt the NSFilePresenter protocol) do not receive some of the messages that they're supposed to receive, especially:
  • presentedItemDidChange
  • presentedSubitemDidAppearAtURL:
  • presentedSubitemDidChangeAtURL:

  You can workaround this by implementing the relinquishPresentedItemToWriter: method and checking to see if the writer actually wrote when your file presenter reacquires. You can also use FSEvents to observe file system changes

• In this beta, messages about changes to files in a directory are not getting delivered to objects that adopt the NSFilePresenter protocol.
• While reporting a bug related to the iCloud storage interfaces, please include the logs collected during your debugging session. To generate these logs, you must install a special debug profile on your device.The debug profile can be obtained from http://connect.apple.com. This profile enables the generation of debug logs that are needed to diagnose any problems using iCloud storage. The instructions to collect the logs are:
  1. Install the profile. (The easiest way to do this is to mail it to yourself and open the attachment on their device.)
  2. Reproduce the bug.
  3. Sync with iTunes to pull the logs off your device.
  4. Attach the logs to your bug report. You can find the logs in ~/Library/Logs/CrashReporter/MobileDevice/DeviceName/DiagnosticLogs.

  These logs can grow large very quickly, so you should remove the profile after you have reproduced the problem and pulled the logs for the bug report.

• NEW: File names in iCloud Storage are case sensitive.

iMessage

• NEW: iMessage beta 1 will be unable to communicate with iMessage users on beta 2 or later.