http://bugs.winehq.org/show_bug.cgi?id=18647
--- Comment #11 from Roderick Colenbrander thunderbird2k@gmail.com 2009-06-06 09:06:04 --- Yeah it seems to work after all (was double clicking and not single clicking properly). In the full app (I can ask on monday) for some reason the expanded combobox list is not shown at the right y-coordinate (it is shown lets say 1 or 2 rows too low).
Roderick