Menu stays hilited

[Joe Lewis Wilkins]

Not terrible, but when I make a certain Menu selection it acts as  
expected; but, when the associated commandkey is used, the action  
expected is performed but the menu remains hilited. I even added an  
"unhilite" menu at the appropriate place - but no luck. Ideas? The  
item, in case it may be relevant, stops music playing and is only  
available when music IS playing.
TIA,
Joe Wilkins