Hello, take a look
<img src="http://i.imgur.com/xL2RM.jpg" border="0" />
After of exporting simple HTML5 website with letterbox scale fullscreen.
when i toggle fullscreen mode on landscape orientation it crops the screen and leave like 100 px blank(iPod Touch 4 uses 960 x 640) on top of the screen.
I'm sorry for bad quality of that picture.