There's a strange offset on our status bar:

and the navigator bar. I changed the background colors to make it more clear. If I call getLocationOnScreen() on the StatusBarView it reports 0,0. Which clearly is wrong.
Changing the wallpaper will make it appear above the status bar until the screen is redrawn. The purple arrow points to a single line that also appears in the apps screen, but I think it's a symptom of the other error.
I'm pretty much lost of ideas. Anyone?
In landscape mode it looks like this:
