I keep trying to respond to a private message I got the other day and it just reamins in the Outbox.
Is there a problem with the PM system?
I've sent/received several since the forum upgrade and it seems to work. I do know that PMs remain in the Outbox until they're read. In the old forum, someone PM'd me a question which I answered right away, then my reply stayed in my Outbox for months while other PMs were coming and going just fine. I finally deleted the one in my Outbox as no longer relevant. At the same time, the poster was posting regularly. I figured that some just don't notice their New Message messages.
Wonder if there are any other reports like yours/ours, though? It may be a long-standing issue, although the benefits of forums like this make me hesitant to bitch about the imperfections.
Edited to add - Of course, I DO bitch, but I hesitate first.