http://bugs.winehq.org/show_bug.cgi?id=11938
--- Comment #2 from Chris Boyle chris@boyle.name 2008-03-08 17:12:31 --- Hammer version was build 4032 from Steam (it seems impossible to use any earlier version because of Steam, except the old 3.5 beta which won't edit HL2 maps).
N.B. Also the fix suggested in bug 2398, using wine hammer.exe -- -opengl, seems to have no effect.