Given that you are getting (apparently) some kind of disk corruption, and given that disk buffers are stored in memory prior to be flushed to disk, I'd start by running (ideally overnight) Memtest86+ and see if that, er, flushes out any errors.
Keith -- Next meeting: Blandford Forum, Wednesday 2011-03-02 20:00 Meets, Mailing list, IRC, LinkedIn, ... http://dorset.lug.org.uk/ How to Report Bugs Effectively: http://goo.gl/4Xue
