Windows 7 guest freezing when using Java application

[AoS]

Hello,

I've been experiencing random VM freeze for a couple of months with different Virtualbox releases but have now been able to reproduce the problem --> the machine hangs when starting a specific Java/ASP application on the guest. Host is running Ubuntu 11.04 64 bit Guest is running Windows 7 64 bit

The symptom when the freeze occurs are the following:

• VM unresponisve (mouse icon doesn't change, screen freezes, ...)
• if I resize the window, the screen/display becomes "scrambled" (see screenshot)
• Virtualbox log doesn't indicate anything when the system freezes
• Only way to solve the issue is to power off/on the VM

I tried a couple of different things (like disabling 2D/3D acceleration, nested paging, ...) but without any success.

[AoS]

Screenshot when resizing window

[AoS]

Vbox log (crash/freeze occured at 1:55 just before the resize)

[fred]

screen shot of the crash.