Well, PNGs are nice and all, and so is animation. So, animated PNG support would be nice!
See bug 17022 for a discussion of how this is platform specific. For Safari, APNG support would require changes in ImageIO that are tracked as <rdar://problem/5618737>.
Big thanks to whoever implemented APNG in Safari! Apple should make an official announcement about it. Nitpicking now... frame blending is a little bit buggy: http://imgur.com/a/QiG3Q URLs for testing: https://people.mozilla.org/~dolske/apng/demo.html http://littlesvr.ca/apng/blendover.html