If you use PGP 5.x, 6.x or 6.5x with FreeBSD and have removed the apm device from the kernel, PGP will dump core with a floating point exception. Keep this line in your kernel:
device apm0 at nexus? disable flags 0x20 # Advanced Power Management
No idea why or how this affects PGP.
If you know of any problems this causes, I'd like to know.