wesing

Hello all -

I have a question about the board. When I am browsing the threads, I go through the Archives into the groups and look at the threads one at a time. I hit the back button when I have viewed a thread to take me back to the menu and look at the next one. My problem is that lately when I press the back button, the screen doesn't go back. So I click the back button to look at the screens I have been to, but instead of my browsing history I see page after page of ad.doubleclick.net. Does anyone else have this problem? Is this a virus?

Thanks for any info.

Darren