http://bugs.winehq.org/show_bug.cgi?id=28369
--- Comment #5 from GyB gyebro69@gmail.com 2011-10-03 11:49:05 CDT --- (In reply to comment #4)
http://source.winehq.org/patches/data/79492 should fix it
The patch indeed fixes the problem. Tried with WinRar 3.93 and 4.01.