Incompatibility with genesis framework

Yeah it was just an misunderstanding all the time ?? But it’s nice to know that there’s not any incompatibility going on!

As I’ve said in our mail conversation (just to clarify to others that might read this), I do think that the mobile browsers are fetching the correct images as well. Since both iPhone 5 and 6+ has high resolution (2x and 3x) displays, the browsers will select larger images than expected.
I suggest that you take a look at the Picturefill example page with different devices ??