Hi, I had same problem when install virtualbox-ose-dkms and problem was that i did install once virtualbox-3.2 (oracle version) and it seens it was badly uninstalled.
Under /var/lib/dkms I removed directories vbox* and reinstalled and everything works again. jack-sparrow:/var/lib/dkms# ll total 20 -rw-r--r-- 1 root root 6 jul 8 2008 dkms_dbversion drwxr-xr-x 3 root root 4096 sep 28 19:23 nvidia drwxr-xr-x 3 root root 4096 sep 8 20:21 vboxdrv drwxr-xr-x 3 root root 4096 sep 8 20:21 vboxnetadp drwxr-xr-x 3 root root 4096 sep 8 20:21 vboxnetflt Regards
