I have a Kensington trackball, which means I can click a mouse button without touching the ball, and there is absolutely no mouse movement when I click.
When I do such a mouse click on the window decoration "close" button, I see the button animation as it appears to be depressed and spring back up which makes me believe it did indeed see both the press and release events. But fairly often, the window will just sit there, not closing till I finally touch the trackball and cause some mouse movement event, then the window finally pops out of existence. Clearly this is the worlds most unimportant problem, but I just got curious about it, so I thought I'd ask if anyone knows something that would cause this.
