Posting to Wall Problems - Feb 2013 - Resolved in v13.6
Facebook applied a breaking change to its API on Feb 6, 2013. The change disables posting to Facebook in the way implemented in my app.
I was notified about the change two days prior and have been working on finding and implementing a solution. For updates on my progress, please check our Facebook page . The problem affects all users posting to Facebook and I can communicate this way to everybody faster and focus on solving the problem.