2010/1/7 Roberto Ragusa mail@robertoragusa.it:
That is really bad. If the machine is unreliable, any kind of hard computation (such as data compression) will have problems.
I agree. Have you run memtest on it, Dave? It should be in the repo or already an option from the boot menu. You can download the live CD from http://www.memtest.org if you prefer.
If your memory passes, it could be faulty/overclocked CPU or overheating. Check these things too.
-c