well... unfortunately, web browser could indeed affect the way website works. But... reverting to the old IE were not really a great idea, especially on older OS such as Windows XP which won't be able to have the latest version of it. And most of PC user should already know how susceptible IE against things like malware and stuff.

And from what I read, this is really a very old issue that hasn't been fixed yet. Or worse, maybe not even care to. And I'm also talking about the old-401 errors too.