I just noticed this happening today.
In forum posts and comments, images from sources outside of KYM display fine.
But if you insert an image from KYM it displays http://a.kym-cdn.com/assets/blank-b3f96f160b75b1b49b426754ba188fe8.gif instead of the intended image.
This happens on my desktop and phone.
Edit: Now no images are displaying from any website on desktop. Mobile displays forum images but not some comment images.
James: Windows 7 64 bit, Chrome, 1920×1200
Screenshot: (which I can't see)
http://i.imgur.com/W4EhElu.png
Help us, James D: