On my iPhone 4, after I updated the software to iOS 5 beta 6 by restoring it and importing a backup of my data, the Photo app is stuck with a spinning wheel and the "restoring" message:

Everything is working correctly otherwise, all my albums, events, faces and places have been synced to the phone and the photos are showing without problems.
I'm wondering what the "restoring" message means, it's stuck on "0 of 444" since yesterday.