sysinstall crash kernel: type12, code=0

Hello All,
	I'm experiencing a crash from sysinstall booted from CD doing
an upgrade.  The crash occurs when the installation first starts
processing the bin package.
	I've tried 5.2-BETA and a current-snapshot from yesterday.
The current-snapshot is much happier about ACPI though it still
complains that it can't find CPU0.  I'll try 5.2-RC1 shortly.

	The crash itself looks like (copied by hand)
kernel:	type 12, code=0
stopped at _mtx_lock_flags+0x43 cmpl $0c0b893c,0
db> wh
_mtx_lock_flags(0,0,c0865e5b,900,0)
ufs_setdirty
bdwrite
ffs_update
ufs_vnoperate
vrele
kern_chown
syscall
Xint syscall(16,FreeBSD Elf32, chown)

	--Mat
-- 
	The state has no business in the bedrooms of the
	nation.
			- Pierre Elliott Trudeau