downgrading to xorg_7.2-0ubuntu11_i386.deb xserver-xorg-core_1.2.0-3ubuntu8_i386.deb xserver-xorg-dev_1.2.0-3ubuntu8_i386.deb prevents this bug.
downgrading to xorg_7. 2-0ubuntu11_ i386.deb xorg-core_ 1.2.0-3ubuntu8_ i386.deb xorg-dev_ 1.2.0-3ubuntu8_ i386.deb
xserver-
xserver-
prevents this bug.