iTunes

• The version of iTunes that comes with the GM release cannot sync devices that have the beta 7 software installed. To avoid this problem, do the following:
• Sync any devices that have beta 7 installed to the version of iTunes that came with beta 7.
• Upgrade iTunes to the version that comes with the GM release.
• Connect the device and install the GM software. (Understand that you might see a failure to sync error when you first connect the device.)
• After installing the GM software, restore from your backup you made in step 1.

Music Player

• FIXED: When deleting a song or video from Music/Videos on the device, the Music Player app crashes.

Security

• In iOS 5, the signing of certificates with MD5 signatures is not supported. Please ensure that certificates use signature algorithms based on SHA1 or SHA2.

Springboard

• Push and local notifications for apps appear in the new Notification Center in iOS 5. Notification Center displays notifications that are considered “unread.” To accommodate push and local notifications that have no unread status, set your application's badge count to 0 to clear that app's notifications from Notification Center.

UI Automation

• When using the performTaskWithPathArgumentsTimeout method of UIAHost in a UI Automation script where the API outputs excessively (say, thousands of lines of text) to standard out or standard error, the task may deadlock until the timeout is reached, at which point it will throw a JavaScript exception.
• The lock() and unlock() functions of UIATarget have been replaced with the lockForDuration() function.
• In iOS 5, you can now trigger the execution of a UI Automation script on an iOS device from the host terminal by using the instruments tool. The command is:
  • instruments -w -t