http://bugs.winehq.org/show_bug.cgi?id=15762
--- Comment #3 from Lei Zhang thestig@google.com 2008-10-30 19:16:52 --- maybe a WINEDEBUG=+menubuilder when instlaling an app will be helpful?
Also, in regedit, check the value for HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders -> Desktop