You can see the problem here accessing the site on your mobile (for me Iphone):If you go back to portrait after going to landscape.
http://machinas.com/wip/stradviarius/startpage/
the height of the blocks <section class="block">
change height when changing the mobile orientation between portrait and landscape. It's css is set as:
.block {
height: 50vw;
width: 50%;
}
How can I avoid this behaviour?