http://bugs.winehq.org/show_bug.cgi?id=30491
--- Comment #2 from Nikolay Sivov bunglehead@gmail.com 2012-04-21 02:40:49 CDT --- Created attachment 39876 --> http://bugs.winehq.org/attachment.cgi?id=39876 patch
This should help. Actually I'm surprised it's a first report of this problem, cause every non-UTF8 with no prolog will fail the same way.