JMEDesktop: mouseposition problems


i tried to use a jmedesktop in a jmecanvas, but i got some problems with the awt-mouseevents created by the jmedesktop. Only every second click is converted into an awt-event and the position of the mouse is updated far more less.

I tried to fix this on my own, but I'm a bit stuck. However,  i did look at jmedesktop and it seems like the mouse position is not updated. More specific:

The inputhandler does not call XUpdateAction.performAction(…) and YUpdateAction.performAction(…) despite the fact they registered for move-events.

Does anyone know where this problem might come from and/or how to fix it?