OK, this is what was happening. Now I know it was Kazaa's fault that I was getting redirected to PerfectNav.com.
Your site was just trying to give me the "The page cannot be displayed" message (probably because you're working on something), but thanks to Kazaa, they were redirecting me to PerfectNav:
"PerfectNav is a browser helper object that redirect your URL typing errors to PerfectNav's web page.
"Kazaa Media Desktop comes with a software program called PerfectNav, which is provided by eUniverse, Inc. PerfectNav is designed to redirect your URL typing errors to PerfectNav's web page. This software helps keep Kazaa Media Desktop free. The PerfectNav software is provided pursuant to the PerfectNav End User License Agreement (located below as Exhibit A), which you acknowledge that you have read and accept." etc.