9to5mac is the only site I've noticed this occurring, but just recently it seems that Safari 7.0 (10.9) does not display the embedded PNG images that are in their stories. If I click on the image, Safari displays the PNG image by itself. I've tried restarting the browser. I tried turning off extensions (ghostery, clicktoflash). I've tried to repeatedly to refresh the page. Other images display fine in Safari and the PNGs display fine in Firefox (25). Any ideas?