http://bugs.winehq.org/show_bug.cgi?id=15983
--- Comment #4 from Adys adys.wh+winehqdotorg@gmail.com 2008-11-09 12:34:39 --- Can you try launching the installer again on a clean .wine? Just do WINEPREFIX=~/.wine/newprefix wine Installer.exe
This will also reset your gecko install. If you installed ies4linux or other stuff like that, please say so - this makes this bug invalid.