A couple of suggestions for improving usability:
1) You can resize the menu window - I like to do this because as an administrator you do have a lot of menu options. As I test things I also log in and out a lot. It would be nice if the menu window position and size were retained so that next time I log in the size is retained.
2) Active Tab Highlights - in the Compiere theme (which I like) the active tab of a multi tabbed window is not differentiated very clearly from the none active tabs. It would be nice if this could be done.