http://bugs.winehq.org/show_bug.cgi?id=28528
--- Comment #4 from Ken Sharp kennybobs@o2.co.uk 2011-10-01 06:00:35 CDT --- For reasons I cannot understand, my compiles don't always create "Program Files (x86)", but I do have a wine-1.3.20 that does, and does not have this bug. It does seem to be related to which version of Program Files the installer decides to use.
I don't know if there is an underlying bug here regarding the compiles, but it could just be my system.
The pre-compiled .debs, that I can only assume are compiled correctly (and are 32-bit), do suffer this bug.