User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20040913 Firefox/0.10.1 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; rv:1.7.3) Gecko/20040913 Firefox/0.10.1 If you are on a page and navigate to a page with the exact same spelling for its URL, but a different case, the back button will bring you back to the page prior to the first page. E.g if you are on http://en.wikipedia.org/wiki/Duck_and_Cover and navigate to http://en.wikipedia.org/wiki/Duck_and_cover (a different page), pressing back will return you to what you were on before Duck and Cover. Reproducible: Always Steps to Reproduce: 1.Navigate to a page with the same spelling but different case to the one you are using. 2.Press the Back button Actual Results: The back button brings you back two (or more, I presume, but cannot find a suitable test case) pages rather than the one intended. Expected Results: Brought you back one page

*** This bug has been marked as a duplicate of 99091 ***