Well, I've had a look and the postings aren't there...
However, I think we've been moved to a different server during the last 24 hours. So I suspect that the hosting company restored data from a point a bit earlier than the time the switch was made, which means that the postings in the interim were lost. (Nice of them to warn us.
Apologies to anyone whose postings have disappeared. Unfortunately, there's nothing I can do to recover them. But I will take this up with the hosting company - I think the same thing happened last time.