4 -> 5 Problem

I build 5-CURRENT every night, and NFS export src and obj
to my other CURRENT machines to update. I've been doing 
this quite happily this way for a while. When I try to
do an installkernel on a stable machine, I get:

root_at_testbox:/usr/src# make installkernel
Bad system call (core dumped)
*** Error code 140

Stop in /usr/src. 

I can no longer do this on any of the current boxes either:

mkdir -p /boot/kernel
install -p -m 555 -o root -g wheel kernel /boot/kernel
*** Signal 12

Stop in /usr/obj/usr/src/sys/P6MPFW.
*** Error code 1

Stop in /usr/src.
*** Error code 1

Stop in /usr/src.

I tried with -DALWAYS_CHECK_MAKE as well. Have I missed 
something in UPDATING? Anyone else doing this without 
issue?

the Current target machine is from Thu Sep 25 14:32:19 GMT 2003,
the stable one from Mon Mar 24 16:30:45 GMT 2003, and the 
src and obj are fresh from last night.

Lawrence Farr
EPC Direct Limited