This problem also happens a lot in Google Earth version 3 when you navigate in it using OpenGL mode with buildings layer.
In my application (3D scenery navigator)) the problem looks similar:
Quite often while navigating screen just stucks and then when you try to press any button in the window( or key) ,there is a beep,and then you can’t do anything at all,only to restart the computer.
Is it driver problem?
Any advice how to prevent this?
Thanks in advance.