I have Ubuntu 12.10 32-bit on a dual boot with Windows 7 64-bit and installed updates over the past Friday.
Saturday when I booted up, the login screen had major graphical issues where it looks like almost the entire screen is blocked out with a weird striped screen. I can just barely see my wallpaper at the top and I can log in.
I am running a Radeon HD 6570 video card using ATI's drivers. Since Saturday, I have tried to repair from disc but the issue remained. I tried reinstalling fresh and I get the proper image until I run updates. I've basically tried everything I can think of but the issue always comes back after the latest updates.
As of right now I think my options are to go back to 12.04, try 12.10 64-bit, or try one of the generic proprietary drivers.
I know of the issue involving Radeon, ATI and the blank desktop/no mouse situation but this isn't related to that as I can get it to happen without having Catalyst on the system.
Any insight, help, or shared grieving would be appreciated.