FreeBSD 6.2 Stable fatal kernel trap

[Hóka Ádám]

I have random reboots on freebsd 6.2 
i tried to turn off acpi, and disable all kernel modules, which i put into loader.conf.
the crash occurred on a fresh install too. i tried to use the computer without sound card and video card too(and Xorg off course not loaded), it was used as a simple gateway, with minimal load, and it was also crashing in that way.
these crashes are random, but i can reproduce them by starting a game in tremulous.

any other info i should provide?

thank you for reading

-- 
Hóka Ádám <hokaadam at gmail.com>