Why are x2 images blurry in safari?

Question

safari

Here all the pictures in the sliders are blurry (blurry and not so clear). This bug is visible only in Safari. Pictures cost x2 for retina. I do not know what to do. The boss asks to fix it, and at the same time leave x2.

Answer 1

It somehow ugly decreases for you, not to 320 pixels, but to 321. Also, the size changes when hovering. Maybe this is the problem?
I noticed the same thing - resizing on hover, and because of this, the ugly behavior of the picture, in the liveJournal magazine

Answer 2

They seem to be jumping... Try hard sizing them.