On Friday 14 Mar 2014 12:41:22 Guido Budack wrote:
> So far are the mentioned 'hardware-faults' totally abstruse and further not
> topic related comments unwanted.

If your memory is faulty, or your PSU is playing up you could find that the 
hash calculated is wrong.  It only takes on bit to flip the wrong side and 
your hash could be thrown out.

-- 
Regards,
Mick