Aaaah. I followed the instructions in this thread and now have art for only a few albums. There are no mediaartlocal folders being created for most albums even though they worked fine when I copied them in originally. Any suggestions?

Tracker is such a piece of crap. I had to laugh when I saw it was one of the things Nokia was bringing to Meego. There is a great open source python lib that can read all kinds of tags perfectly, but they had to reinvent the wheel really badly.