[head tinderbox] failure on powerpc/powerpc

[FreeBSD Tinderbox]

TB --- 2008-08-16 22:59:40 - tinderbox 2.4 running on ref7-amd64.freebsd.org
TB --- 2008-08-16 22:59:40 - starting HEAD tinderbox run for powerpc/powerpc
TB --- 2008-08-16 22:59:40 - cleaning the object tree
TB --- 2008-08-16 22:59:43 - WARNING: /obj/powerpc/src/usr.sbin: Directory not empty
TB --- 2008-08-16 22:59:43 - ERROR: unable to remove old object directory
TB --- 2008-08-16 22:59:43 - tinderbox aborted
TB --- 0.23 user 0.97 system 3.45 real


http://tinderbox.des.no/tinderbox-vimage-HEAD-powerpc-powerpc.full