Adobe Experience Manager, when an image is first loaded, creates multiple versions of the image at different sizes. Unfortunately, it is possible to link to those images in a way that drives Dispatcher absolutely bonkers. For more (and how to solve the problem), see Albin’s Blog | How to Use HTML5 Adaptive Image in Adobe CQ5?
About The Author
Deke departed Southern Alabama as a young man, leaving the humidity and fire ants behind. The fire ants are catching up with him. He works for Adobe. Despite that, his opinions expressed on this site are his own and should never, ever, be attributed or blamed on Adobe. Ask him what he thinks of chiggars sometime. Home Page | GitHub | Adobe Blog | Twitter | LinkedIn