How do I stop a JME app from capturing the mouse?

Is there some way that I can tell jME not to capture the mouse (or maybe all input)?  I'm trying to debug a game's display, and can't get anywhere, since the jME application holds the input focus and won't let go of it.  Alt-tab doesn't even work.

(I'm on gnome under linux, btw.)

if you just want the mouse to work outside of the JME app you can use