panic booting install CD

[Graham J Lee]

Graham J Lee wrote:
> Hi,
> 
> I'm trying to install 6.0RC1 from the disk image and the instructions at
> http://people.freebsd.org/~grehan/iso_install.txt but get the following
> panic at every boot:
> 
> panic: Assertion curthread != NULL failed at
> /usr/src/sys/kern/kern_mutex.c:268

Having tried some different search terms in the list archives I've found 
this:
http://lists.freebsd.org/mailman/htdig/freebsd-ppc/2005-October/001372.html
same problem, similar hardware.  I wonder whether there's any more 
progress come out of that?  I can't get a backtrace from the hang - 
partly through not knowing how kdb works but also because the keyboard 
seems unresponsive at the db> prompt.

Cheers,

Graham.