Windows 7: Nirsoft.net's "/utils/..." section won't load in some browsers

Every time I try to view any page under nirsoft.net/utils/ (for instance, www.nirsoft.net/utils/index.html or www.nirsoft.net/utils/iehv.html, any address that starts with www.nirsoft.net/utils/ ) using Firefox 10 (or any previous version, now that I think about it), it gives me an error saying that "The connection was reset" and (under that) "The connection to the server was reset while the page was loading." When I try to view it with IE 9, I get a generic "internet explorer cannot display this webpage" error. But when I view it with Chrome or Opera, they all work fine. And all the other computers in my house seem to be able to view any page under that domain just fine with any browser as well.



I can load any other page off nirsoft.net just fine, it's only pages under the /utils/ section that have issues. Also, I was able to get it load perfectly using the IP address (69.73.166.124) in place of "nirsoft.net" E.g. "http://69.73.166.124/utils/index.html" loads just fine.

I've run scans with Malwarebytes and MSE and they all came up clean. I don't have anything in my hosts files blocking it either. Anyone know what the heck could be going on here???