Regarding both posts above -
This kind of thing can be caused by confused cookies. If you have nothing valuable to you in the cookies, and you shouldn't rely on that, you can easily clear them all. Just make sure you have no stored passwords for web sites that you might need. You can clear them by site but due to the external ads you will have no idea what cookies to clear if clearing the pprune ones doesn't resolve it.
Just google [<your browser name> clear cookies].