Responsive Design in IE10 on Windows Phone 8 - HTML5/CSS3 Experiment - Firewoiks: Extensions, resources & tutorials for Fireworks, Dreamweaver & HTML5/CSS3
Windows Phone 8, which for some reason behaves differently to every other mobile OS by interpreting device-width as the actual resolution size (either portrait or landscape depending on how it's oriented), instead of what the manufacturer (or browser vendor) has decided is the optimal viewport width (such as the “standard” 320px in portrait).