We have been getting a new error in our Android app since beginning of October. We can reproduce it using curl, so have something changed regarding commenting articles through the API?
Here is an example of a call that fails using a valid access_token
curl.exe -k https://graph.facebook.com/comments?ids=http://www.cnn.com
-F "access_token=AAACwlRNQEK4BAPr3ByJBVLN8uwDjDOk1JFhIWNB4xiH..."
-F "message=Test from curl"
And the result is:
{"error":{"message":"An unknown error has occurred.","type":"OAuthException"}}
I really hope someone can help out here as this is causing a lot of negative feedback in the Android Market :-/
This is a bug in the Facebook SDK:
http://developers.facebook.com/bugs/209018432505064