6.0-Beta1: panic: zone: L VFS Cache(0xc1040840) slab 0xc15b4fb0 freelist 11109540 out of range 0-12

While trying to setup a gmirror following this guide:
http://people.freebsd.org/~rse/mirror/

I got a panic while dumping /usr to a mounted gmirror partition

	dump -L -0 -f- /usr | (cd /mnt/usr; restore -r -v -f-)

I was running inside a vmware with out a serial console so the only info I
got is screenshots :-| 
 
	http://motd.dk/panic-27072005/

$ uname -a FreeBSD milhouse.motd.dk 6.0-BETA1 FreeBSD 6.0-BETA1 #0: Tue Jul
12 18:05:55 UTC 2005 root_at_x64.samsco.home:/usr/obj/usr/src/sys/GENERIC i386

Crash dump available so more info can be provided if necessary

- T