Facebook shows news feed messages that aren't returned by any of the APIs

I noticed that my feedback news feed shows certain posts that aren't returned by any of the API's. (I tried the GraphAPI and the legacy REST API and FQL).

I can see those status updates at http://facebook.com on my news feed and I can also see them in the Facebook mobile app on iPhone and the mobile app on Windows Mobile.

Some of my friends seem to have set a privacy setting. I think it is this one: "How people bring your info to apps they use" - decheck "My Status Updates", 开发者_开发问答although I can't confirm that is the only reason their posts don't show up, it seems one possible explanation.

So, what API are these facebook mobile applications using which returns the same data as the web site ? Is it possible for me to build another facebook client using that API?

Have you acquired the read_stream extended permission? This is required to see all postings. Typically without it you don't see any posts, but I think you can see posts that are marked as being completely public.