I just tried to send a PM twice. The first time there was a pair of PHP errors, and the message about it being successfully sent. In my user CP, it showed no messages in the sent folder. Just to be safe, I hit back a few times, and resent the PM. Upon reaching the CP, the sent items folder is still empty. I refreshed it and it still showed no sent items. So am I misunderstanding something and failing or is it safe to assume my message wasn't sent for some reason?