If you're stuck on apt-get update/upgrade because of a broken package, then you'll need to run either of these two commands to unstick it:

cd /var/cache/apt/archives <press enter>
dpkg --force-overwrite packagename or
dpkg --purge packagename

The second option will remove the faulty package and you'll be able to apt-get update/upgrade as usual. The first option is Stephen's favorite command, as I've noticed that he uses it a lot. I've only been using the second command for unsticking myself and starting over from another angle, but you should do whatever floats your boat.

HTH,

Durand