hey there,

I’d like to keep the size of the featured image for posts of the kind “photo” in their original size (unless they are bigger than the allow maximum of 683 (or 679, didn’t find that out. Could also be a resizing thing for this post http://papapelz.de/551)
If you go to http://papapelz.de, you will see that the photo posts are 163×163, which is resized from the original 640×640 (coming from instagram.com automatically).

thanks,
Steffen