In the Go-oo team, we wanted to refactor some toolbar popups to tend to some general look. The following screenshots give a good idea of the differences between those popups.
Then I changed the popup windows by something looking more like the third of the above screenshots. For some popups I even removed the menu to use normal dialog controls: the effect was pretty awful with the openSUSE 11.2 default GTK theme (with black menus). Here are some screenshots to better realize what has changed, though there are other refactored popups...
The patch has been committed to ooo-build master branch, but is not yet applied as there are still some crashes to fix when reopening the toolbar.