I hate Kazaa's popup ads. I eventually found a patch you can download that eliminates the popups. There is also loads of Spyware with Kazaa.

After you download Kazaa run it. Run this Adaware program while Kazaa is running (If it isn't running then you will delete a spyware program that will stop Kazaa from working. I think the name of it is Cydoor).

http://www.lavasoft.de/index.html

Ok, the last 2 Cydoor files for this spyware program are the things that cause the ads to popup. I found a program that gets rid of these ads in Kazaa. You can find it here:

http://www.phazeshift.co.uk/