Some iPhone developers that make apps for Facebook got quite a surprise on Tuesday--their developer credentials had been deleted, without warning, leaving their apps and customers high and dry.

All Facebook developers have their own set of credentials so their apps can communicate with the APIs provided by the company. When iPhone apps contact Facebook, the site responds and recognizes the developers' credentials, allowing the apps to do their intended jobs. Without those credentials, apps error out.

NodConcept's Chris Diskin, makers of the Emoti for Facebook app, said he was contacted via e-mail on Monday by Apple saying that Facebook believed his app was infringing on their rights. They provided him with contact info at Facebook and said he had five days to resolve the issue.

More: http://news.cnet.com/8301-13579_3-20002481-37.htm