I just ran across and mentioned Revo Uninstaller 1.42 just a little over a week ago. They released...

Revo Uninstaller 1.50

...shortly after that on Feb. 28. The link above takes you to the version history so you can see the changes.

I've liked what I've seen in Revo Uninstaller after using it a bit to try to clean out those odd bits and pieces of applications that I've tried and no longer use. It seems to do a pretty good job of reporting left over directories and files as well as registry entries after the main uninstallation process has completed.