WordPress just presented their new gallery system, and I can't get it to work on full width of the theme (sorry for my English btw). To see my problem you may check this blog post: http://mongolom.wordpress.com/2012/09/16/featured-playlist-kopfkino-cinema-uk/
The gallery won't use the whole width of the theme, even though it should do exactly that, I checked several other blogs for it.
I also tried a gallery with other photos, freshly uploaded just now, but with the same result.
The blog I need help with is mongolom.wordpress.de.