You know I've been using Linux for .... well a while, and the only time I ever say it actually crash was when I took out a floppy and forgot about it and tried to use it. Even then the system didn't crash, I just saw a dump and was amazed I actually got the thing to crash.

Getting apps to crash si easy but getting Linux to crash takes real talent.

One of my machines was up for 200 days straight and I was using it as a DESKTOP, KDE loaded, a P3 733 MHz 384 MBs RAM, burning CDs, using it for everything, all patches installed including Kernel (You don't have to reboot unless you want to actually USE the new Kernel) and I would open like 30 tabs in Firefox daily to check stuff, and didn't have a problem other than the occasional firefox crash.

And even when firefox got screwed up bad enough rm -rf /home/gore/.mozilla took care of that, launched it again and all was well.

In other words, I didn't ever need a reboot, maybe just an application refreshed once in a while.

I will say this though, I did once in a while refresh X by doing ALT+CTL+Backspace just to refresh it. But in almost a year of uptime, the machine not once crashed.