Again... After some time, that I've spend without any troubles with Ubuntu 12.06, I've decided to upgrade to 'more stable' 12.10. This was my mistake. It is much more worse in real life then 12.06.
At first glance, it looks nifty, but Gnome 3 still looks like a cheap Chinese imitation of Mac OSX. But in Mac OSX, everything looks perfect! Every pixel or every icon is perfect! Gnome still looks like amateur's work... More worse, every time, I've got a lots of strange errors about calendar or something else, that I've never used. After upgrading to kernel 3.5.0.18, I can't even login to my system with NVidia driver without 'nouveau' support at all... I even can't switch to new terminal by Alt+Ctrl+F... ! That's all. I've decided to switch to Fedora again. Though.. Here are some troubles also... But with some help from Mr.Google, I've found some useful solutions.