Thats the correct why to update/install latest vbox + enable usb support (after reboot):
Code:
dpkg --purge $(dpkg -l|awk '/virtualbox/{print $2}')
unfreeze-rc.d
apt-get instal dkms
dpkg -i virtualbox*.deb
freeze-rc.d
adduser $(getent passwd 1000|sed 's/:.*//') vboxusers
sed -i 's|\(domount usbfs usbdevfs /proc/bus/usb usbfs -onodev,noexec,nosuid\).*|\1,devgid='$(getent group vboxusers|cut -f3 -d:)',devmode=664|' /etc/init.d/mountkernfs.sh
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