http://bugs.winehq.org/show_bug.cgi?id=18728
--- Comment #29 from Ruslan b7.10110111@gmail.com 2010-06-20 07:32:55 --- (In reply to comment #28)
Driver bug, see attached test case. Apparently it doesn't like "stretching" from a multi-sampled back buffer.
Have you reported it to nvidia?