IOS 5.0.1 multiple same album in music app

Bug in iTunes 10.5.0 which results in a single album appearing twice on iPhone-4 with new IOS 5.0.1. Resolution appears to be via iTunes. Open the album and scroll down each track. I found that some tracks had different cover art. Click on the cover art on one of the tracks and make sure you paste against each track in turn on iTunes. Resync and the problem is resolved on your iPhone.