Is Ubuntu freezing when you try to quit? I have a probable solution for you

When I re-installed Hardy recently I went through System > Preferences > Sessions and disable a number of things I don’t need running in an attempt to get this older, rather underpowered computer running a little better. Unfortunately I disabled one thing too many and my system started freezing on me when I tried to Quit (shutdown, restart, etc.). While looking for signs others were experiencing the same issue I came across the bug that has a fix for the issue.