http://bugs.winehq.org/show_bug.cgi?id=26763
--- Comment #14 from Sven Arvidsson sa@whiz.se 2011-04-27 06:22:16 CDT --- Created an attachment (id=34372) --> (http://bugs.winehq.org/attachment.cgi?id=34372) glxinfo -v output
Hmm, glxinfo doesn't have a "-c" option, at least not on my system, did you mean "-v"?
As for the rest, I'm afraid I'm in over my head. Could you or Henri bring it up with the Mesa devs directly?