A larger image was just posted to the New Horizons Twitter account.
Image:
https://pbs.twimg.com/media/CJ32XAEVAAAp_8T.png:large
Tweet:
https://twitter.com/NASANewHorizons/status/62092320062141235...
Image:
https://pbs.twimg.com/media/CJ32XAEVAAAp_8T.png:large
Tweet:
https://twitter.com/NASANewHorizons/status/62092320062141235...
Also when they release the pic on Twitter in crappy form before they release it in uncompressed form.
I hear so many complaints about Twitter recompressing pics I figured that would happen here.