>Thanks for testing this Alan. After reading the other replies and testing >some more I've noticed that it only happens when the mouse pointer is over >the combobox or dropdown. If I move the pointer off the combo box then it >works as it should (or appears to so far).

Hello Tracy !
I have a similar problem with a combobox in the one of my application. Could you please explain in more details how to force this misbehavior, because I only got it once and cannot repeat it again, but my users do it periodically.
Thank you, very much Mariam