Updates, May 24/2012: CCleaner v3.19.1721

Changes:

- Added option to skip User Account Control (UAC) warning.
- Added support for Firefox 13.0 beta.
- Moved Thunderbird to be cleaned separately.
- Improved Aurora History cleaning.
- Improved Google Chrome Saved Passwords cleaning.
- Improved Scheduled Tasks detection.
- Improved Uninstaller Installation Date on XP.
- Added cleaning for BitDefender.
- Improved detection for Malwarebytes Anti-Malware, VLC Media Player and Avast! Antivirus 6.
- Minor bug fixes.

Download: http://www.piriform.com/ccleaner/download/standard

 You might want to wait a few days for the "Slim build" (no add-ons) to be released:
http://www.piriform.com/ccleaner/builds