[Theme: Linen Pro] Problem with full width images

My site is http://www.skymningslage.se. On the main site and pages I want the sidebar, on all single posts I want the full size of the site. So far so good.

However, the images seem to still somehow be restricted to 610px, see this post for example: http://www.skymningslage.se/beredskabs-operations-center-1 The text is full size but not the images. (images are 950px native).

Any ideas on what code still could be wrong?