Just upgraded to 12.10 today. Everything seems fine for now, aprat from one thing:
The launcher on the left side of the screen doesn't come up after moving the cursor to the left side of the screen. It IS there since it show the app start animation and I can have it on top all the time, but I'm really fond of it being hidden most of the time.
I did check the sensitivity settings and even set it up to MAX (thus high) and it changes nothing.
Please help ;) Cheers