http://bugs.winehq.org/show_bug.cgi?id=19182
--- Comment #29 from diafero@arcor.de 2010-11-29 14:05:53 CST --- Actually, while that works, it is not a proper fix: It results in this error message being shown whenever any wine app is launched:
wine: cannot find L"C:\windows\system32\winemenubuilder.exe"
Removing the corresponding Run key from the registry only temporarily fixes that, until the next prefix upgrade is performed.