When the drop down combo box (JComboBox) is expanded, in Sun's GUI it is possible to navigate over items using the keyboard cursor arrow keys (up and down). Our Classpath only works when selecting items with mouse. This can be easily reproduced observing our combo box demo.
ESC key that should end the session collapsing the box is also not working.
Both issues are no longer reproducible. I think they got fixed with my (un)installKeyboardActions() works.