Comment 39 for bug 1081307

The apport-collect command exited with:

Package virtualbox not installed and no hook available, ignoring
*** Updating problem report
No additional information collected.

Anyway, kernel is:
ii linux-image-3.5.0-26-generic 3.5.0-26.42~precise1 Linux kernel image for version 3.5.0 on 64 bit x86 SMP

And vbox packages are:
ii virtualbox-guest-dkms 4.1.12-dfsg-2ubuntu1 x86 virtualization solution - guest addition module source for dkms
ii virtualbox-guest-utils 4.1.12-dfsg-2ubuntu1 x86 virtualization solution - non-X11 guest utilities
ii virtualbox-guest-x11 4.1.12-dfsg-2ubuntu1 x86 virtualization solution - X11 guest utilities
(from ppa)