Nono that's not it. It just doesn't register my inputs.
What you mean is another annoying feature. Some dork once typed an artist as "3 doors down". When I try to change it to "3 Doors Down", it automaticly suggests "3 doors down" again. What I do is leave the 3 out, first typing Doors Down, then adding the 3 in front of it. That works, unless I also have an artist named "donovan", then I lose the capital D again.
But that's not the problem I mean.

It's a bug or something. Or the inability to deal with a folder with more than 1000 MP3s in it.
(I try to order them in artist folders, but I can't just place the MP3s into a new folder, because then iTunes loses the play count [a function that I love

], or I have to manually find all the songs for it...)