My apologies for the inconvenience. It must be something to do with the upgrades made over the weekend. I cannot currently estimate how long it might take to fix. It might be as well to refrain from using PM's until we are able to diagnose and fix the problem, otherwise the messages will most likely go nowhere and not be available to the recipient.
I will provide an update here as soon as we've got this figured out. However we don't have an excess of support resource just now, so it might take a few days.
It's a good job this site is for people benefiting from the fruitage of the spirit - including patience
And your patience is certainly appreciated.
Apollos