I have just moved back from Linux Mint 14 cinnamon to Ubuntu 12.04. In Linux Mint 14 the scale mode puts an X next to each window and gives the option to close them one by one in scale mode. Can I add the close mode with Compiz Settings Manager in Ubuntu 12.04?
Even better (AFAIC), you can set a keybinding or mouse binding (eg wheel click or right click) to close windows.
Check the Scale Addons in Utility, not Window Management, and set up what you want in the Bindings tab.