The problem is quite trivial – a bug in the browser detection under . Perhaps you remember how IE10 came out and broke your pages with lots of Java Script errors?The issue here is the same – these browsers were released after .
Also see Web Site Testing FAQ in the FAQ Part 2 for a discussion of web site testing considerations; also see What's the best way to choose a test automation tool?
Let's say you have a folder within your application called Private.
You set up Forms Authentication to protect this folder, such as in the following web.config snippet: The URL to your Private folder is
NET4 and it does not recognize their User-Agent request header.
You can verify that browser detection is causing a problem by using Internet Explorer’s F12 Development tool to temporarily change the User-Agent string sent by the browser.