random crashes

[Bruno Wolff III]

On Sat, Feb 26, 2011 at 20:02:26 +0100,
  Andras Simon <szajmi at gmail.com> wrote:
> 
> The crashes seem to happen more frequently when I'm doing something
> interactively (even if it's just browsing, running yum). This morning
> it was running for hours under heavy load with no problems, but
> crashed a few minutes after I started interacting with it.

That sounds potentially like a video driver issue. If you are using compiz,
you could try metacity instead as that does less 3D stuff.

Nouveau seems better in F15, but upower tweaks an issue that causes annoying
screen flashes every 30 seonds and for at least some nVidia cards (including
an nv28 I have on one machine), the blank period is about 1/2 second.

Once the alpha release is out, you might try a live image of it to see if
that resolves your crashing problem.