http://bugs.winehq.org/show_bug.cgi?id=29014
--- Comment #5 from A Wine user RandomAccountName@mail.com 2011-11-07 23:48:25 CST --- (In reply to comment #1)
Created attachment 37358 [details] stub
This stub does prevent the crash for me, but it's true that returning FALSE causes problems (browser helper objects such as add-on toolbars are not loaded). Everything seems as expected after making it return TRUE instead.