Keyboard and mouseclick disabled at windows host with 'view login sceen at resume'

[Vbug]

If I use VirtualBox without the Guest drivers installed, I am experiencing a problem when I leave the VBox window focused and then don't use my computer for longer than 10 minutes, the time I've set before the screensaver activates. Because I've set the computer to prompt me to log in again, it shows up the login screen. But except moving my mouse around, I can't do anything; Ctrl+Alt+Del, pressing the power button shortly, nothing works and my only option is to press and hold the power button... For some reason the log isn't available via Ctrl+L, but I think the problem is clear; when the login screen appears, VirtualBox is still stealing my keyboard and mouse clicks. Best solution for this in my opinion would be that VBox checks whether the user is still logged in each few seconds, or that the keyboard focus stops when the screensaver at the host becomes active.