Some albws will unwrap in different applications and exactly why is a mystery. On mac I use File Juicer when all else fails, but I am sure windows users have their preferences. If you haven't seen it read this thread and follow the link at the begining of Only a Hobo's post aswell. The only way to tell if a file is properly wrapped afaik is to see if you can unwrap it
http://www.gnutellaforums.com/showth...ighlight=album
Hope ths helps a bit.