http://bugs.winehq.org/show_bug.cgi?id=23899
--- Comment #1 from Vincent Povirk madewokherd@gmail.com 2010-08-23 17:20:12 --- Please check that the FAQ at http://wiki.winehq.org/FAQ#head-34c8b5d78823a60c9651b4c9848c06a1aa8fea48 ("I deleted my Wine menu, and now I can't get it back.") does not apply to you.
Terminal output probably isn't useful anyway, if Wine is creating .desktop files and folders. Probably gnome doesn't like something about the generated files.