I've developed a Rails 3 app. If you browse it using Chrome or Firefox it will be displayed using the defined media queries. But if you use IE 7 and 8, at least, you will see media queries are not being recognized (i.e.: centered header "Acceder", mobile-style menu behind Search icon, single-line products, etc.).
I've read a lot of posts, and I'm using respond.js and some other fixes, but it looks like there's something else that's causing the problem.
Could you please help me?
Thanks.
IE 7 and 8 do not properly support CSS media queries: http://caniuse.com/#search=media
I do see you note that you are using respond.js to get around this limitation. But as @sdcr pointed out above, this file is missing from the requested path.
I also note the following error on your linked page:
Uncaught Error: Bootstrap's JavaScript requires jQuery
bootstrap.min.js:6 (anonymous function)