I just installed and ran the newest version of Ad-Aware(version number 6.0) and it has added a load more features onto the previous version I have been running. It spotted a load of dodgy stuff not previously highlighted. It seems to do a pretty thorough job at spotting "tracking cookies" used by advertising companies (probably in popups) to gather information about you which they have no right to take.
Quack!
GtD.