"PAX: suspicious general protection fault: 0000 [...]"
See those URLs for screen pictures:
http://frupic.frubar.net/4641
http://frupic.frubar.net/4643
It only happens to machines running version 2.6.23 of hardened-sources,
all intel x86 (no amd64), but all completely different (different dell
models and even "homegrown" machines).
It's not triggerable so far, sometimes it happens right on boot (e.g.
process "udevd") or during regular operation after boot (several
different processes seen in the "Process:" output).
Thanks :)