This looks like http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=576255 Have you installed the virtualbox-ose-guest-dkms package on the host system?
** Bug watch added: Debian Bug tracker #576255 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=576255 -- Differents Unknown symbol with last kernel Lucid https://bugs.launchpad.net/bugs/562512 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
