User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0 Some sites differentiate between foo.com/bar and foo.com/BaR . If foo.com/bar links to foo.com/BaR , then going from one to the other will not create a new entry in the history (or at least, it does not work correctly with the Back button). Reproducible: Always Steps to Reproduce: 1. Visit http://en.wikipedia.org/wiki/TeX . 2. Find the place in the second paragraph where there is a link to "LaTeX", and open that link in a new browser window. 3. In the new window, click on the link near the top of the article to "latex". (note that the URLs provided herein are examples - others surely exist). Actual Results: The Back button remained disabled at the "latex" page. Expected Results: The Back button should have become enabled, and clicking it should lead from the "latex" page to the "LaTeX" page.

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