Thanks, I'll do that soon. Can you please tell me how to find out my wxWidgets version?
[Edit...] It's okay, I found it:-
SVN 4349
Build Aug 5th 2007 (20:48:23)
wx2.8.4
OpenSuse 10.2
KDE desktop
Incideantally, this was installed from a package manager - not built from source.
If it's any help, quite a lot of the combo boxes also seem to dropping upwards, instead of downwards - although I'm not sure if they were already like that (I think probably not though)