I have Flash Player 9 (9,0,115,0) on my Mac, and am getting the same behavior
on Windows XP...

Perhaps try not moving the mouse between subsequent clicks will make it more
apparent... I select something from the combobox. Then, the first click on the
button works properly... but when you release the button (and don't move the
mouse) it returns to the "up state" (not "over state"). Additional clicks don't
respond with a "down state"... it just flashes the "over state" momentarily.

It's causing me troubles because my interface asks users to first select from
a combobox to navigate and then they can click to subsequent items with a
button: next, next, next... to page through the selection. But this strange
interaction is hanging up the next button on the second click (it never gets
the down state).

Thanks for checking it out... I sure would appreciate any thoughts on the
matter...