No idea, but apparently nobody else does either
, so is it a case of different configs? If you had a ~/.vimrc you should still have a ~/.vimrc but maybe something went wrong. Or if you were using Vector's global vimrc, maybe it changed.
Or 6.3 is buggy.
Maybe.
(I have Vector, but I don't remember 3.2 and I've hardly touched 4.0, so I can't be of any specific help.)
A last shot in the dark is maybe vim's reading the wrong termcap/terminfo stuff. Can't really help with that, but it might be an area to search for more info.
What does 6.3 offer, btw? I hadn't even realized it was out. Any reason not to downgrade?