I ran into a few problems during the upgrade but all of them were fixable.

Partial Upgrade fix: Downgrade non-ubuntu packages to their ubuntu versions if an ubuntu version exists. My system refused to complete the upgrade (and I had to upgrade it through aptitude) because of a few package conflicts (mostly from the schmidtke repository).

Numpad Fix: My computers numpad stopped working after upgrading. Somehow an acceptability option had been turned on. To fix this go to System > Preferences > Keyboard and go to the mouse keys tab and uncheck the checkbox.

Remove custom G15 drivers: A while back I had installed the G15 drivers based on a tutorial posted on the ubuntu wiki. These drivers should now be uninstalled as Ubuntu Hardy comes with its own drivers.

Everything appears to be working fine now.