jk9@ubuntu:~$ sudo apt-get install -f xfce4 --fix-missing
Reading package lists... Done
Building dependency tree... Done
The following extra packages will be installed:
  xfce4-cpugraph-plugin xfce4-mixer xfce4-panel xfce4-session xfce4-systray
  xfce4-toys xfce4-trigger-launcher
Suggested packages:
  xfmedia
The following NEW packages will be installed:
  xfce4 xfce4-cpugraph-plugin xfce4-mixer xfce4-panel xfce4-session
  xfce4-systray xfce4-toys xfce4-trigger-launcher
0 upgraded, 8 newly installed, 0 to remove and 2 not upgraded.
Need to get 383kB/1285kB of archives.
After unpacking 5599kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://us.archive.ubuntu.com hoary/universe xfce4-panel 4.2.1.1-1ubuntu1 [383kB]
Fetched 383kB in 13s (28.9kB/s)
Failed to fetch http://us.archive.ubuntu.com/ubuntu...buntu1_i386.deb  MD5Sum mismatch