A lot of folks neglect to check for updates when running Adaware too, so make sure you're using the lated pref file.
My partner here thought he had it all cleaned up when I asked if he checked for a new pref file... I got a blank stare. Seems he had never done that. Once we did it found over 100 new items.
I've been using Ad-Aware for quite some time - on advice from Kao. You can update without the purchase. I just downloaded the Spy-Bot and ran it after running Ad-Aware and it found 10 more threats. Sounds like the 2 are a good combo.