After upgrading to Ubuntu 12.10 ..I started facing several issue. One major issue is if I start Ubuntu and start using any browser after sometime screen gets frozen and nothing works but right click still works while left click doesn't work at all. I some how manage to reboot using right click or hard reset. but every time I face this issue. It happens with all the browsers like Firefox, Chrome, Chromium etc.
ALT+TAB also stops working ..its show very random behavior...scrolling works with some hick-ups.