Funny BIND errors make it go down!!!

[Gustavo Castro Puig]

Hello:
	We're using BIND 9.1.2.
	Sometimes it write this in the logs, an then dies(!):

May 30 18:49:22 zeus /usr/local/sbin/named[13955]: rbtdb.c:735:
INSIST(node->references != 0) failed
May 30 18:49:22 zeus /usr/local/sbin/named[13955]: exiting (due to
assertion failure)

	I'm sure the rbtdb.c is a piece of code ;-), but I don't want to
touch anything until somebody tell me what to do...
	It's a very funny message... and I never saw it before(!)
	I'm restarting "named" with a script every time it goes down, but
this is *NOT* the way the things must work...

	Any idea of what to do?

Best regards,
	Gustavo Castro Puig.
	IFX Networks Uruguay.
	gcastro at ifxnw.com.uy
	http://www.ifxnw.com.uy