I learned a funky way to dig up old kernel logs today on #linux. To find out what caused segfaults, type
sudo zcat /var/log/kern.log.*.gz | grep 'seg'
On this box that shows segfaults as far back as last May.
Of course for more recent seg faults one might just say..
dmesg | grep 'seg fault'
Nice. Thanks to Chris V.
More to come later.