Re: First Attempt at Responsive Web Design = Headache

[gilgimech]

I just took a look at you demo page and respond.js isn’t anywhere on the page.
If you’re using the respond.js that’s built into modernizr.js. That can be your problem. There’s a bug in modernizer that causes the built in respond.js not to work.
Get a new copy of modernizr without respond.js and add respond.js in the page directly. You could also use IE condition comments to load it.