The Problem is not about missing images but about the sidebar which supposed to show pictures, most commented post etc.
This is the main site of my Blog http://thebigvan.de/travel/
As you can see there is no sidebar on the right side however if you click on a single post e.g. http://thebigvan.de/der-erste-eintrag/ the sidebar is visible.
The setting for the sidebar is on both sites the same.