[olug] A mythtv mythtery

[Dave Thacker]

The characters:
Mythbuntu 11.10-Running both front and back end
Hauppage PVR-350
Dell Optiplex 210L/P4 3.0 Ghz/2 GB Ram

I built this last weekend and set up recordings.  The system stayed up for 5 
days and recorded about 15 shows.  When I play any show back, the system 
spontaneously reboots anywhere from 1-5 minutes into the show.  Top tells me 
the system is bored and is not swapping during playback.  I see no smoking 
guns in these logs:
kern.log
syslogl
mythbackend.log
mythfrontend.log

Where should I look for clues next?

Thanks!
Dave