2.5.bk no longer boots from NFS root after bk pull this morning

[Andrew Walrond]

2.5 has been booting fine over NFS for ages, but after getting latest 
stuff with a bk pull this morning, it no longer works

Do I need to do something new, or has something busted?

The relevant bits from dmesg are

Sending DHCP requests ., OK
IP-Config: Got DHCP answer from 10.0.0.1, my address is 10.0.0.103
IP-Config: Complete:
       device=eth0, addr=10.0.0.103, mask=255.255.0.0, gw=10.0.0.1,
      host=hal3.office, domain=office, nis-domain=(none),
      bootserver=10.0.0.1, rootserver=10.0.0.1, 
rootpath=/eboot/slash/hal.office
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
Looking up port of RPC 100003/2 on 10.0.0.1
Looking up port of RPC 100005/1 on 10.0.0.1
net/sunrpc/rpc_pipe.c: rpc_lookup_path failed to find path 
/mount/clntc398a880
RPC: Couldn't create pipefs entry /mount/clntc398a880
Root-NFS: Server returned error -13 while mounting /eboot/slash/hal.office
VFS: Unable to mount root fs via NFS, trying floppy.
Kernel panic: VFS: Unable to mount root fs on 02:00

Andrew Walrond