https://bugs.winehq.org/show_bug.cgi?id=36014
--- Comment #3 from Austin English austinenglish@gmail.com --- I suspect that part of this is that debian's winbind/samba packages have a mismatch. I just noticed that the winbind library is 3.6.6: ii libwbclient0:i386 2:3.6.6-6+deb7u2 i386 Samba winbind client library
while winbind itself is 4.0.0. Forcing a newer libwbclient0 (4.1.6) from unstable didn't help.
I'll file a debian bug as well.