Hi John,
here's an example:-
Bunch of albums listed for Jean-Michel Jarre (with a hyphen) and a couple of others listed for Jean Michel Jarre (without). When you scan down your artist list I presume, like me, you'd prefer to see just one chap listed with that name.
On the Control screen or in Control:PC, I go to the albums to change, hit edit and start to type J...e...a..n etc. Sooloos artists that contain that combination start to emerge in a list and I select the one I want (or create a new one if the correct one isn't there at all). As soon as you hit save it is done and visible in the system.
In Squeeze, you edit the meta data using whatever your fave tag editor is (mp3tag for me) and then re-scan the database for new or changed files. Not a drama but it isn't instant like Sooloos.
So, the tag edit facility in the database is a very good thing IMHO.
Another example from your neck of the woods that I had to fix.....AC/DC and AC\DC.
Hope that helps.