http://bugs.winehq.org/show_bug.cgi?id=16445
--- Comment #4 from Tobias Vogel tobias.vogel@bluewin.ch 2008-12-10 13:53:41 --- I just figured out, that the installation of the .NET Framework works, if "wineprefixcreate" is called explicitely.
winetricks seems not to create a .wine-environment correctly.