http://bugs.winehq.org/show_bug.cgi?id=28486
--- Comment #23 from Hans Leidekker hans@meelstraat.net 2012-04-30 02:28:50 CDT --- (In reply to comment #22)
I cleaned the .wine prefix, removed the Ubuntu package "mono-complete" (v. 2.10.8.1-ubuntu2), installed the proper mono from https://github.com/downloads/madewokherd/wine-mono/winemono-0.0.2.msi (I see it as Wine Mono version 0.0.2 in the "Uninstall Wine Software" list), but still got unknown error during MS Office 2010 installation.
Please attach a WINEDEBUG=+msi trace form an attempt to install Office 2010.