Has anyone encountered this problem? The "Default Access type" of my app is set to "Read & Write", and my app can authenticate with OAuth and perform all sorts of reads with no problem, but whenever I try to write (specifically when I try to tweet from my app) I get a 401 "Operation could not be completed" error.
I'm developing on an iPhone using the MGTwitterEngine 1.0.8 with OAuth support, and using a secure (https) connection.