To add a little to Fun Times note - One of the changes coming up in the next maintenance release is a revamp of the PM system. It seems the current method could be causing many of the slowdowns and errors all of us have been seeing. As a temporary step, yesterday Admin turned off the PM system trying to see if it makes a difference in performance and if the error rate decreases.
During the PM shutdown, all PMs are disabled and as TP and Scott noted, the subscription notifications can't be cleared, The way the software is currently written, PMs and notifications are intertwined, so disabling PMs is also affecting notifications. The upcoming changes to the PM system are intended to separate the PM part of the software from the the main body of the forum software to improve performance and reduce errors.
I think most of you will agree the forum was very difficult to use over the weekend especially. So this PM shutdown is to see if it allows a return to basic functionality. PMs will be coming back as soon as possible.
Thanks for your patience, folks. We are trying!