Firstly I just wanted to apologise for any popups that any of you may have been getting in visiting my site. I have been getting them myself and thought it was other sites causing this. It was becoming quite frequent and I found out that the free service I use for web-traffic analysis had changed and started doing little popups (this was the little icon that used to be on the menu).
They have now been replaced with another service. If you still see the icon, make sure you do a SHIFT-F5 on your window to make sure you get the latest, but do post a comment if you have any other issues.