I have a similar issue, see https://answers.launchpad.net/ubuntu/+source/gnome-terminal/+question/180044. But I remember seeing a bug report with the same issue long time ago — AFAIR it was filed against xfce4-terminal.
** Summary changed: - characters on screen broken in unity 3d + Some characters on screen are broken ** Package changed: ubuntu => xserver-xorg-video-intel (Ubuntu) ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Confirmed ** Tags added: likely-dup -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/884555 Title: Some characters on screen are broken To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/884555/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp