I have a facebook desktop app with some test users all having granted the stream_read & offline access permissions. I can easily retrieve posts to each users' stream & profile. What I cannot do easily is retrieve posts that a user has made to one of their friend's walls. In fact, this used to work with a rather complex multiquery, but has stopped working now, or is working only intermittently... Does anyone care to share their method if one exists or discuss what restrictions there might be to this type of complex querying?