I've logged into the UNIX machines in the lab, but when my windows manager starts I am getting a blank screen or messed up tool bars. How can I fix this?

If you have logged into our UNIX machines before they were all updated to Lucid, you will need to remove your old config files for the windows manager you are using. You can use Ctrl+Alt+F1 (Ctrl+Alt+F7 or F8 will get you back to the graphical login screen) to get to a virtual console and the dotfiles/directories in question are: