Well it might be a bug, it might be an odd function of Blender too. I am not really sure. The weird view only appears when in 'free view' in perspective mode. (The view where you gan orbit around your scene with the middle mouse button) The problem does not appear in orthografic view, in camera view, in rendered; shading and wireframe view and in the views from top, the side, bottom etc. (Also orthografic) Second weird thing is, I cant select any of the objects with a single mouse click. I now have to use the circle selector or draw the selection box. The grid in the viewport disappeared too.
I do not know if I clicked something wrom or used a 'bad' keyboard shortcut or if it really is a bug. I just want to get this dumb piece of garbage out of my viewport.
This picture shows the bugged view. Just as I said. In all the other view modes and in the camera etc. it is just fine.