Did any of you noticed that when using -ms-viewport (with specific width of 320px or device-width) then web browser content can be moved outside available space? It seems like document size is wrong so i can scroll it's content to the left but there is nothing then white empty space. I can also zoom it out(but i should not) and it and it's size after that is not always the same. I'm aware of http://mattstow.com/responsive-design-in-ie10-on-windows-phone-8.html but it does not help. It happens after second or third navigate to the same content and disappears for example when device is rotated.