Garble in URL's on initial page load which disappears after page refresh

Hi all,

I'm having an issue with the SEF not entirely working entirely as should, I'm getting a huge array of text and numbers placed at the end of my SEF urls sitewide.  SEF is installed on Joomla version 1.5.2.

www.seriousx.com/viral-marketing-techniq...b15f80c0790c74058662

it's not a browser caching issue, and if I hit refresh I will get;

www.seriousx.com/viral-marketing-techniques.html (correct)

I get the same problem in other browsers, and each time I close and re-open the browser the same issue returns on initial page load.

Any ideas as to the problem?

Sean.

It looks like session cookie query string, it is generated automatically by the browser by some reason (you use sessions on your site?), and doesn't have much to do with SEF Advance.

It's a fresh installation of Joomla, if there are any cookies it's what's bundle with Joomla 1.5, any other possibilities?