Facebook, the world’s largest social networking site, has just blocked Path’s access to its social graph after it got a lot of complaints from its users about the spam messages that Path has been sending. Path, the mobile based social network, has been reported as sending text messages to Facebook friends of Path users as early as six in the morning. This was in the last week. This activity has disturbed many people in their sleep and hence, has annoyed them.
Even though Facebook has blocked access to Path for its social graph, you will still be able to log in to Path using your Facebook account, and you will still be able to post to your Facebook wall from Path. But you will just not be able to find your friends on Facebook via Path.
Source: Slash Gear