I've run memtest86+ over night (14h?) and it didn't find any problems, so AFAICT this is more likely to be a kernel issue than a hardware issue.
Help! -- 2.6.15-23-686 hangs a couple of times per week https://launchpad.net/bugs/49450 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
