Some other things I've noticed are:
1) Should toolbars/menus/status bars be shown when clicked on the preview form button?
2) When changing a value (such as Border) in the object properties and then clicking on another control, it doesn't change
3) Cut/copy/paste operations via ctrl-c/ctrl-v/ctrl-x don't work (I think this is an actual cb problem though)
4) Would it be a good idea to move controls around via the object inspector/resource tab thing aswell?
5) When a sizer is in wxVERTICAL orientation, moving a control (like moving a control up) inside the sizer shows only the blue horizontal colouring placement thing.
6) The list of wxArtProvider images for say a toolbar/bitmapbutton item is incomplete, a full list of them is available here: wxwidgets_dir\include\wx\artprov.h