I am running Lubuntu 12.04, and did an upgrade today
sudo apt-get update && apt-get dist-upgrade
and now I am getting weird issues with horizontal lines on certain applications. The picture below is Opera open on Facebook.com.
This is Picture Viewer open with a normal picture of my laptop. It looks like the bottom 20 pixels of the image are just repeated horizontally.
This is sublime text 2.
I had been running updates regularly about once a month since 12.04 came out, and have not had any issues until now.
How can I start to fix this? I tried starting the system in the previous kernel version (3.2.0-36-generic-pae), but the problem persisted.