I downloaded and ran the 12.10 live cd (today, 1/29/13) and it ran fine, and installed just fine as well. However after installing I let the system update the essential/security updates and now the graphics drivers are broken. The system either boots into a blank orange screen with vertical stripes (and is entirely unresponsive), or it boots into a strange screen where the entire login screen if shifted to the right, so the far right of the screen shows up on the left (the date/time, gearwheel, etc).
When I try to log in with the second case it goes to the background screen then goes completely unresponsive, and I'm unable to pull up a terminal or anything.
So my question is, is there something about the latest set of security/essential updates that may break graphics drivers? And if so, is there anything I can do to fix/resolve it, or prevent it from happening in the future? I'm ok with just not updating for now, but I don't want to never update ubuntu...
My graphics hardware is an AMD Radeon HD 7570. I've installed no additional drivers, and downloaded the updates to a fresh install of 12.10 from the live cd.