export pdf borderless keynote 6.0

I use keynote to create graphics for latex. In keynote '09 I could simply export them as PDF borderless.

Keynote 6.0 seems to always put this annoying black border around the exported PDF. Is there a way to export without this border?

(The hint to use the print functionality is worthless to me here as it does not export the slide in its dimensions but on a printable sheet which requires manual trimming later which I want to prevent.)