"Both intel core 2 duo (64 bit) machines freeze when running ubuntu 
10.04 with GNOME, usually within 10 minutes of logging in. (When I say 
freeze, I mean everything simply stops - no mouse, no keyboard no 
control of any kind. The display simply stops and resembles a screensave 
snapshot.)

Now both of these machines run fine with Ubuntu 10.04 KDE. These are not 
identical systems. They have different motherboards, different chipsets, 
different graphics processors and different network cards, but both 
behave identically. It makes no difference if I use PS2 mouse/keyboard, 
usb mouse/keyboard or wireless mouse/keyboard. It also makes no 
difference if I connect to the network with a wireless card or with 
straight ethernet cable.

Before installing Ubuntu 10.04, both machines worked fine under earlier 
versions of Ubuntu GNOME."

#874 at
http://ubuntuforums.org/showthread.php?t=1478787&page=88



Yeah, but that 10 minutes is the happiest 10 minutes of your life, isn't it?