The website I'm creating (test6.lazyfoxdesign.co.uk) is responsive and makes heavy use of images for the background. I use high resolution images and scale them down using CSS for smaller resolutions. In all web browsers, except desktop Safari images are nice and sharp.
I attached screenshot of the issue. Google Chrome on left and Safari on right.
(Enlarge the imgur image to see difference.)
In the screenshot below (actual size) Chrome is top, Safari is bottom: