Bootstrap compatibility issue for IE7
Apparantly IE doesnot support media queries which is the heart of bootstrap framework. A Quick Fix would be to include Respond.js from here
The goal of this script is to provide a fast and lightweight (3kb minified / 1kb gzipped) script to enable responsive web designs in browsers that don't support CSS3 Media Queries - in particular, Internet Explorer 8 and under. It's written in such a way that it will probably patch support for other non-supporting browsers as well (more information on that soon).