http://bugs.winehq.org/show_bug.cgi?id=10601
--- Comment #38 from Anastasius Focht focht@gmx.net 2009-10-10 03:55:34 --- Hello,
looks like the default NT unicode case mapping table in your WINEPREFIX got somehow corrupted.
Can you check if 'l_intl.nls' contained in your winetrickscache 'dotnet20' folder is around 5K size? If not, remove that file to force winetricks to redownload it (upon 'winetricks dotnet20'). Repeat install steps (e.g. clean WINEPREFIX, winetricks dotnet20).
If that still doesn't work, check output of this:
wget http://kegel.com/wine/l_intl.nls -O ~/.wine/drive_c/windows/system32/l_intl.nls
Report back.
Regards