mount_nullfs dangerous?

[Petr Murmak]

Hi!

I want to use mount_nullfs on FreeBSD 6.0-STABLE AMD64 to share part of
filesystem tree between different jails, but i found this in man pages for
mount_nullfs:

BUGS
     THIS FILE SYSTEM TYPE IS NOT YET FULLY SUPPORTED (READ: IT DOESN'T
WORK)
     AND USING IT MAY, IN FACT, DESTROY DATA ON YOUR SYSTEM.  USE AT YOUR
OWN
     RISK.  BEWARE OF DOG.  SLIPPERY WHEN WET.

Is this still valid? Because there is date May 1, 1995 underneath, so it is
near 11 years old warning!?

Petr