I am using Internet Explorer 9, and have an issue only on the Chronicle forums -- when I try to go back a page by using the "back arrow" at the top left corner of I.E., nothing appears to happen -- as in, I don't get returned to the previous page.
When I right-click on that arrow, I have discovered that repeated entries for "https://googleads.g.doubleclick.net/pag" have populated the list of previous "pages".
I presume that the ads on the Chronicle forum pages are causing this.
Have you all checked your computers for Malware? I was recently having some issues with Google search and the return button. When I clicked on a google search result, it took me to some other search page and then wouldn't let me return. I ran several Malware programs, and eventually Malware Bytes updated their definitions to what I needed and that took it off. I also downloaded Microsoft Security Essentials too. Both are free Malware detection programs.