Here's an example of my other site (using Vb2)
http://www.intense-training.com/forums/ (has a 4/10 PR)
http://www.intense-training.com/forums/index.php3?s= (has a 0/10 PR)
But the funny thing is, they are the same page!
Google just seems to except a cleaner, shorter link!
I know it has something to do with the htaccess and re-write rules, I just forget how I did it all!