[tlug] What the heck happened to my NFS server

[Dave M G <dave@example.com>]

TLUG,

Yesterday, I one of the machines on my home network upgraded the kernel 
to 2.6.32-24-generic.
Today, I can't connect to it by NFS.  Usually all the computers hook up 
when I boot.
When I try to run a mount -a command, I get this error:

mount.nfs: mount to NFS server '192.168.0.4:/home/media' failed: RPC 
Error: Program not registered
So of course I went down the Google trail to see if I could figure out 
what was going on.
Long story short, most of the solutions I found online were based on how 
to install NFS and set it up. However, so far as I can tell, all the 
programs, files, and configurations I had that have been working for 
ages are still there.
Any idea how I can troubleshoot this?

--
Dave M G