Win 7 Crashes with every attempt to use 'Shared Folders'

[wilberfan]

I'm running Windows 7 as a Guest on a Linux Host using VirtualBox 4.0.0 r69151. I can set up shared folders manually, (VBoxManage and net use x: etc), but every time I try to do ANYTHING with the Devices/Shared Folder GUI (add, edit), The guest OS crashes immediately.

Any thoughts?