~ # /media/VBOXADDITIONS_4.1.12_77245/VBoxLinuxAdditions.run                                                                   [pts/6 - 974H 0J 0R - 2012-05-10 10:27:22 - 0+02:10 - 0.29 0.30 0.27]
Verifying archive integrity... All good.
Uncompressing VirtualBox 4.1.12 Guest Additions for Linux.........
VirtualBox Guest Additions installer
You appear to have a version of the VBoxGuestAdditions software
on your system which was installed from a different source or using a
different type of installer.  If you installed it from a package from your
Linux distribution or if it is a default part of the system then we strongly
recommend that you cancel this installation and remove it properly before
installing this version.  If this is simply an older or a damaged
installation you may safely proceed.

Do you wish to continue anyway? [yes or no]