Automattic/jetpack — pull request #77 by taupecat (2014-01-15 03:51:30+00:00)
Title: Replaced individual social media images with a sprite.

I noticed when using the Jetpack sharing module on a client site, that each social service was an individual image. HTTP requests are bad, so I converted the individual images into a single CSS sprite file (actually 2, one for standard res & one for HiDPI).