iTunes

• The version of iTunes that comes with beta 5 cannot sync devices that have the beta 4 software installed. To avoid this problem, do the following:
  1. Sync any devices that have beta 4 installed to the version of iTunes that came with beta 4.
  2. Upgrade iTunes to the version that comes with beta 5.
  3. Connect the device and install the beta 5 software. (Understand that you might see a failure to sync error when you first connect the device.)
  4. After installing the beta 5 software, restore from your the backup you made in step 1.
• Videos purchased from the iTunes Store do not play on a 2nd generation AppleTV over AirPlay with iTunes 10.5.

Mail

• When changing the host name of an email account in settings, blank messages may be seen in the unified inbox. As a workaround, delete and re-add the account instead of changing its host name.

OTA Software Update

• If you are doing an OTA software update, you will need to re-sync your photos with iTunes.”

Photos

• FIXED: When restoring photo libraries from an iTunes backup, some photos may not appear in the Photos application after restore. Please back up your photos before updating to iOS Beta 5.

Reminders

• NEW: If reminders syncing is enabled for a Yahoo account and there is no reminders collection on the server, it will continually get recreated by the phone. Due to a Yahoo server bug, that collection will show up as an event calendar.

Simulator

• Location services are not functional in iOS 4.3 simulator running on Mac OS 10.7 with Xcode 4.2.

Springboard

• Push and local notifications for apps appear in the new Notification Center in iOS 5. Notification Center displays notifications that are considered “unread.” In order to accommodate push and local notifications that have no “unread” status, developers can use their application badge count to trigger a clearing of notifications from Notification Center. When an application clears its badge count (by setting it to zero), iOS 5 will clear its notifications from Notification Center.
• FIXED: The UIPrerenderedIcon key (in the Info.plist file) is not honored in this beta.