Disable the overlay scrollbars in Ubuntu 11.04

With the new Ubuntu 11.04, the scrollbars in almost all applications and windows look radically different than those we grew accustomed with. Here’s how to revert them to the old looks:

sudo apt-get remove overlay-scrollbar
sudo su
echo "export LIBOVERLAY_SCROLLBAR=0" > /etc/X11/Xsession.d/80overlayscrollbars