Hmm...same here.
I had posted my question under the itunes post about a week ago and heard nothing back.
In my case, after the recent update I added a new album to an aready existing artist in my iTunes, synced and the next time I used the ipod , I noticed it had the same Artist 3 times, identical playlist, album tiltes, and tracks!
I've unchecked the artist, synced, and as expected they go from the ipod.
I check them back on and they appear 3 times again after syncing.
The only thing I have yet to do is a total restore. But with 60gigs of video audio and photos, its a bit of a pain!
Im getting very wary of these Itunes updates, remember the infamous -48 error that had every one baffled for about a month?
In my case the artist in question is New Order. I've renamed all my NO tracks to New Order2 as the artist, synced and the artist comes up twice!
I've renamed them back to 'New Order' and clicked on 'Album artist' to be 'New Order' also and re synced and I get back 3 in the list!!!