http://bugs.winehq.org/show_bug.cgi?id=27331
--- Comment #4 from Nikolay Sivov bunglehead@gmail.com 2011-08-07 11:34:08 CDT --- Actually the real problem is that wine doesn't support LOCALE_SNATIVEDISPLAYNAME currently (yes, that's the 0x73).
So installer is about to be Win7 ready, when it can't get this data it uses a fallback path.
I'll prepare a patch.