problem undocking debug window

I'm on dual-head NVidia Ubuntu system. Occasionally my system will
become totally unresponsive for about 20 seconds as I change views. I'm
running build #7364.

To reproduce, do this:

• open the debug view (alt-5)

• press the undock button

• switch to a different view (alt-4 or alt-6 or alt-9)

On my machine IDEA seems to lock up for a little bit. I can fix the
problem by restoring the default view layout (shift-f12).

Has anybody else seen this behavior?

Cory