Mabe it's a good idee to put an extra option into the UPDATE database screen: Read tags again from (selection a directory). At the moment you have to rebuild the complete database if you have changed (a few) tags.
[Edit]And please, set of the ' rename' album when trying to find the cover [/Edit]

I'll second this one since I'm randomly finding songs I didn't add the cover art in the tag for. yes I'm anal about my tags