Ubuntu Tweak 0.6.1 has been released today, adding full support for Ubuntu 12.04 Precise Pangolin. The new version also comes with bug fixes as well as some minor new features:

"Dash color" setting to Unity Settings

"Desktop Font" setting to Fonts Settings

sudo add-apt-repository ppa:tualatrix/ppa sudo apt-get update sudo apt-get install ubuntu-tweak

via Ubuntu Tweak blog

Also, since Ubuntu 12.04 automatically sets the user background as the login screen wallpaper, this feature has been removed.Starting with the 0.6.x series, Ubuntu Tweak has introduced some new features like: Unity-specific settings and tweaks, a built-in Computer Janitor, options to change the theme, icons, fonts and more.To install the latest Ubuntu Tweak 0.6, use the commands below:Or download it from Launchpad