I upgraded my PC with Ubuntu 9.10 and my Netbook with UNR 9.10 both from a fresh install (not with synaptic) and am finding some terrible problems!

It just freezes all the time in both devices! Sometimes when I open a new tab in Firefox, sometime when I am watching a video, sometimes out of the blue! On my netbook, an Asus EeePC 1000H, it freezes whenever I try to turn Off the wi-fi with the keyboard hotkey.

My home PC is a Core2Duo and this is my graphic card info (from lspci)
01:00.0 VGA compatible controller: VIA Technologies, Inc. CN896/VN896/P4M900 [Chrome 9 HC] (rev 01)
In both my devices after freezing, when I reboot, it cant mount my home partition (that I keep separated) and I have to press [ESC] to enter the recovery mode and mount it by myself.

Some people say it must be the graphic card but they are different in both devices and I never had a problem with 9.04...

Does anyone have an idea?