One problem with private messages has been that if there are multiple people in a PM, only the person that is being replied to directly would be notified of a new comment.
Today we added email alerts and notifications for PM conversations.
That is, if someone makes a new comment in a PM, everyone in that PM will now receive an email alert, and the comment will appear in their notifications.
You can toggle 'private message emails' in your settings.
In addition to this change, there are two aspects of PMs that we would like to get feedback on:
1) Should hubwheels be added to PMs?
2) Should the OP be able to add more people to the PM? This is currently possible.
As always, feedback is much appreciated.