yum runs out of mirrors to try when updating

[Amadeus W.M.]

I did a yum update on a fresh F11 install (i386) and yum can't find some 
packages. Does anyone know what's going on?


Error Downloading Packages:
  grubby-6.0.87-1.fc11.i586: failure: grubby-6.0.87-1.fc11.i586.rpm from 
updates
: (256, 'No more mirrors to try.')
  farsight2-0.0.12-1.fc11.i586: failure: farsight2-0.0.12-1.fc11.i586.rpm 
from u
pdates: (256, 'No more mirrors to try.')
  12:dhclient-4.1.0-22.fc11.i586: failure: dhclient-4.1.0-22.fc11.i586.rpm 
from 
updates: (256, 'No more mirrors to try.')
  alsa-plugins-pulseaudio-1.0.20-2.fc11.i586: failure: alsa-plugins-
pulseaudio-1
.0.20-2.fc11.i586.rpm from updates: (256, 'No more mirrors to try.')
  gstreamer-plugins-good-0.10.15-3.fc11.i586: failure: gstreamer-plugins-
good-0.
10.15-3.fc11.i586.rpm from updates: (256, 'No more mirrors to try.')
  gdb-6.8.50.20090302-33.fc11.i586: failure: 
gdb-6.8.50.20090302-33.fc11.i586.rp
m from updates: (256, 'No more mirrors to try.')