[Edit: I originally wrote this post to provide some more context for my e-mail conversation with Louis Peitzman.]
On September 16th, teenage rapper Chief Keef posted a photo to Instagram that showed him receiving a blowjob from an unnamed girl. He got kicked off Instagram as a result. Several websites reported the incident, while at the same time mentioning that they couldn't post the photo for obvious reasons.
Gawker ran a story about it, along with the picture in question. Apparently someone soon realized that a photo of a 17-year-old boy receiving a blowjob constituted child porn, and the story was erased. You can find a non-working link over on Gossip File, as well as on a few scattered twitter accounts like this one.
It's good Gawker caught their own mistake. Unfortunately, they would make a similar mistake the next month, too.