Album Artwork and synching problem

My Ipod for the most part transfers music back and forth perfectly. However recently now when I try and put new artwork on my music, it goes through the normal deleting of artwork, then optimizing artwork routine. When it gets to the end though it says error syncing ipod, unknown error (-50). Something like that. Anyone know what I can do to fix this? Thanks.

Some of us state the same error in this thread:
http://forums.ilounge.com/showthread.php?t=175939&page=12

Not a clue on how to solve it. Ive decided to tag all my mp3s with "Tag Covers" instead of that crappy iTunes art that screw things up and then transfer it all over once and for all. Else its just to sitt tight and hope for apple to fix it.