I have just discovered that the new i.sstatic.net domain does not allow hotlinking. I assume it was done to prevent using the images outside of the SE network, however I kindly ask you to reconsider this decision. Please enable hotlinking.
I have found a link to an image outside of SE network. Usually, I just hover over it and Imagus shows me the image. It doesn't happen with these links. I clicked it. It only shows error 1011 page. I had to open Stack Overflow, go into edit mode and paste the link so that I can hover over it in the preview.