| Hi Josef.
Something really weird going on here! On my Linux and Windows systems I do not see the header. I was suspicious that Opera may have been ignoring the CSS, but would not expect WebKit based browsers to.
However, I've just tested on a borrowed Air and the header is showing as you say. I'll have to further investigate. It must be something to do with the way WebKit handles iFrames. Unfortunately differences between browser engines are all to common :(