I am showing a frame with a list. The list is initially focusable. Click inside the list and drag the mouse outside the component. MouseDragged events will be triggered until you release the mouse regardless of where the mouse pointer is. Click on the button shown in the frame. The list will now become non-focusable. Now click inside the list and drag the mouse outside the component. You would notice that the mouse dragged events stop when the mouse pointer goes out of the component.

This is reproducible since 1.4 only on Win32. This is not reproducible on XToolkit.

I have attached a sample test. Execute it as given above.