Networking keeps stopping

[Homer]

Kubuntu 10.04

Yesterday the networking on my machine stopped working.  I figured it
was something in the building as I didn't make any changes on my
computer that preceded the stoppage.  Ultimately the IT folks here
concluded the problem was I didn't have any entries in my
/etc/resolv.conf file.  They added the nameservers and dns-search,
which got things going, and my machine was declared fixed.  I was
dubious.

This morning networking stopped again.  A quick check of the
resolv.conf file showed it again to be empty.  I made the changes and
restarted networking and was off again.  Then it stopped again 30
minutes later.  resolv.conf was again empty.  I repeated the above
steps, and am posting here before it quits again.

Anyone have any idea what is really going on?  I'm stumped, but that's
not hard to do.  I updated my machine the day prior to the first
stoppage.  No other OS fiddling.