Apart from the other problems I have had in installing 3.6 I noticed early on there were no window borders on the live DVD. It didn't mean much at that stage and only became significant after installation when I tried to set graphics options.
There are no window borders under compiz. No window borders means you can't move them and if they shove themselves under the menu bar it seems pointless having them. I have to set metacity as window manager to get them and metacity does none of the visual effects I require.
Also I cannot get nautilus-gksu installed. Error messages say there is no keyring for 12.10 or some such. The 'Open as Administrator' option on right clicking a folder is something I miss greatly. Will dig out one of those 'Ubuntu Unleashed' books and try to find out how to log on and run as Administrator. If any one can save me the trouble I would appreciate.