Mine ist tilted about 0,5mm, too.
At the German "Reader Club Bord", I've read about other crooked displays, too.
I'm not sure if I should change it again; this is my 3rd T1:
The first one had a damaged frame, the second one had an incredible ghosting and now, the third one has a tilted display.
Seems to me that there's no perfect T1 around!