So, I installed 12.04 64-bit. I immediately had issues getting Picasa 3 sync with web albums to work due to issues with WINE IE6 and 64-bit. I decided it wasn't worth it and decided to try out several DE's to determine what was best.
I finally decided nothing worked better than Unity for me and started attempting to uninstall KDE and Gnome Shell. I used a prepared terminal command with a list of KDE applications to uninstall KDE. It didn't uninstall everything, such as KDE Settings. I then tried to uninstall Gnome Shell. It's not only still in the list of log in options, but it's still there. But when I try the command to remove it, it says it's not there.
Not only that, but now Unity 3D is borked. I get the desktop, but the top panel is missing and the panel on the left is missing. I've tried re-installing Unity, but it says it's already there.
I may end up installing 12.04 32-bit. I currently have only 3 GB of RAM and since I'm considering a new laptop before the end of the year, I may only upgrade to 4 GB. I do still have XFCE and Cinnamon installed if I need to uninstall/reinstall Unity.
Thanks in advance for any help.