OK, after seeing Steph's post, I decided to do a thorough test. Normally I use Firefox to browse DCMM, and I was seeing the image. So I tried the following:
Chrome - failure
IE - failure
Opera - failure
Safari - failure
The above results made me suspicious, because there's no good reason why it should work in Firefox but none of the above 4. That's when I thought "maybe it worked earlier, but it's still in Firefox's cache?".
Sure enough... I cleared Firefox's cache, and now it doesn't show up there either. So the true answer is that it used to work earlier today, now it doesn't.
Jono - I think that's happening to you too. If you clear your browser's cache and then refresh the page, you'll probably see it fail. Something about the Flickr link you used worked earlier today, but doesn't now.