Help - Upgrade doesn't have Responsive Style

[hiker]

I just upgraded to vb 4.1.12 over the weekend and to my surprise I don't have the Responsive Design / Template / Style or whatever you call it. My uploaded images will not adjust to the width of the browser. I'm really depending on this since I installed Everywhere Sidebar and have it visible in my threads so there's less room for the 800px wide images.

Now I need to scroll horizontally to view the whole image.

Can somebody tell me how to set my design as Responsive? It's strange, I had this working during the test phases but somehow have turned it off.

Oddly enough, when I preview my post before I publish, it's responsive, I can adjust the width of the browser and the image adjusts. But once I save and publish, it's no longer responsive.

Here are some screenshots. There's the photo, then the previewed post, then the published post where the right side is cut off.