http://bugs.winehq.org/show_bug.cgi?id=12769
--- Comment #1 from Lei Zhang thestig@google.com 2008-04-24 02:02:14 --- Whoops, it's only for WM_CHAR. WM_KEYDOWN still sends 0x0D.
I sent a patch:
http://www.winehq.org/pipermail/wine-patches/2008-April/053924.html