Groups do not receive mouseEnter messages?

[doc hawk]

bob belabored,
> 
> You are probably right. But the workaround is so simple, putting an opaque green graphic in the group behind all the other objects, that it would be a lot of work to implement just so we didn't have to put a graphic in a group. 

I actually use that background rectangle to change colo as the mouse enters and leaves, to hi light the active row (a group).

However, I *do* have issues with not always catching mouseLeave, especially when the cursor is moving quickly.