Call for Testers: VirtualBox 4.0.6

[Yuri]

I had Ubuntu (64bit) VM with the snapshot, created under vbox-4.0.4.
Now after upgrading to vbox-4.0.6 I restored this snapshot.
But when trying to start the machine it fails with the message:

Failed to open session for the virtual machine Ubuntu64.
Failed to load unit 'HGCM' (VERR_INVALID_PARAMETER).
Details
Result Code: NS_ERROR_FAILURE (0x80004005)
Component: Console
Interface: ICOnsole {....}

Not sure what to do with this machine now.

Yuri