Random Crash

[diegogyn]

I dont know why but each 1 or 2 days the firewall crashs and restarts

Error log:
http://pastebin.com/WXebhhn5

I´m using:

2.1-RC1 (i386)
built on Sun Aug 18 19:11:13 EDT 2013
FreeBSD 8.3-RELEASE-p9

Any ideias?
Thanks!

[jimp]

All of the crashes are different (one in the filesystem code, two in different memory operations), I'd wager it's hardware.