Back on topic: Overhere, ALT+ Arrows for menu navigation does not work in Cubase. I guess the ALT key is reserved completely for shortcuts, but for instance ALT+ Up or Down arrow changes active track height (which I quite like as a find in itself).
The ALT+ Arrows works a little different in Win7 anyway, from what I checked in Firefox, AcroReader and Excel. Pushing ALT and then an arrow does not activate menu selection; ALT has to be released first, and then the arrow keys work as forever in Windows…
EDIT: I see in XP ALT+ Arrows also works after releasing ALT…