Sicne the update to v13.0.02, the messaging system send two messages to everyone and ends up with this screen when the message has been sent.
Adam, that is frustrating. Sorry to hear you guys are having so many problems with Messenger over the past couple version. We are not seeing such issues, so I guess it is a server config issue. Please can you send a message and then get your tech guys to look in your Apache/PHP error log so you can let us know what error message is being generated behind the scenes? That will really help us drill down and find the cause. Ross