[Bug 3788] New: Install gives "The folder name is not valid."

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=3788

Summary: Install gives "The folder name is not valid."
           Product: Wine
           Version: 20050930
          Platform: Other
               URL: http://www.qland.de/qex2/download/qex2setup.exe
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-binary
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
                CC: [e-mail]

I'm trying to install QEX2 from    
http://www.qland.de/qex2/download/qex2setup.exe

The setup runs fine unstil I choose the folder for installation.  Leaving it    
as default gives "The folder name is not valid." error.  Changing it to    
something without spaces, existing or non-existing, still gives the error.

I saw bug 3241 http://bugs.winehq.org/show_bug.cgi?id=3241    
and checked out the latest CVS, but still no go.

Steps to duplicate:  
I used both the Gentoo ebuild of 20050930 and checked it out of CVS, which  
also reported 20050930.

cd /home/user/src/wine 
make distclean 
cvs update -PAd  (done at 15:17 GMT 20051109) 
./configure --prefix=/home/user/wine 
make depend && make && make install 
/home/user/wine/bin/wine /home/user/qex2setup.exe 
Click next until failure message appears.