One year ago i decided to do a "make world" on my server. Since then it is running continously.
$ uname -a
FreeBSD huckfinn 4.9-STABLE FreeBSD 4.9-STABLE #0: Mon Feb 9 21:55:40 CET 2004
arved@sauna.arved.de:/usr/obj/usr/local/home2/source/RELENG_4/src/sys/HUCKFINNipf i386
$ uptime
12:00AM up 365 days, 8:31, 4 users, load averages: 0.00, 0.00, 0.00
Dude, time to start following security advisories. :) RSS feed: http://www.freebsd.org/security/advisories.rdf
Well, the box is not directly reachable from the Internet and all other boxes are running an uptodate versions of FreeBSD.
So it is not so urgent that i need to ruin my uptime.