Russell,

Yes I see all of those artifacts of the problem.

>But I'm still unclear of the exact behavior you're seeing: Do you notice the behavior where if you drag the mouse onto and off the button without clicking, you get the down/up, down/up, down/up visible behavior from the button (as if you were clicking it, but you're not). I have never seen this elsewhere and Grigore is saying he's never seen it elsewhere.