FWIW I am having this same issue on an Acer C7 Chromebook. Worked fine with the 3.4.0 kernel and 12.04, 12.10 but moving to the current 3.8.0 broke something. Dunno if the 3.8.3 patched is going to break VirtualBox for me, since VB is the whole reason I moved to 3.8.0 in the first place.
FWIW I am having this same issue on an Acer C7 Chromebook. Worked fine with the 3.4.0 kernel and 12.04, 12.10 but moving to the current 3.8.0 broke something. Dunno if the 3.8.3 patched is going to break VirtualBox for me, since VB is the whole reason I moved to 3.8.0 in the first place.