Hello Neutral,
I am having the exact same problem which has been spoken about fairly often at the G Forum.
the reason why this has happened to me is because 1 incoming link to my site was to
http://mysite.com
so it was indexed by google with www and without www.
I also have 2 different
PR's for these two sites which are the same.
It has been spoken in other forums that the sites that produce these results may be and I think is penalised for double indexing (mirrored pages).
When I do a search for "mysite" I get double results, one with www and the other without.
I was told to have the sites that link to me change to www. which I have done but am still getting same results from google.
G Forum people told me to contact my server and have
http://mysite.com redirected to
www.mysite.com.
My server said they would have to do this globally, in other words, no way.
I wrote to G and explained the situation, they requested I read the G Forum.
OK, that's where I became aware of this problem but they have no solution other than a redirect.
So I am afraid the situation for me is hopeless.
I hope you have more luck than I did.