Further testing with the client - it does not appear to have anything to do with the user level. It seems that if I'm on the General tab while editing, it saves the record (at least in this test), but if I click over to the Agenda, Speaker, or Sponsor tabs, there's an "item" for each, and it's blank - and I get an error when I try to save.
On the frontend, that saved event shows those sections (Agenda, Speaker, Sponsor) even though there's no data (except the start and end times for the one Agenda item it created.
I'm still testing, but this is wreaking havoc on all my clients and they're very unhappy with this and the other issues we've been dealing with the past year.
I'm at a loss to figure out how to prevent this. People are spending time creating their event and then can't save because entries are made on tabs they never touched and they can't delete them or enter acceptable valid data. They're just screwed and lose all their work.
Whatever it is, it's outside my ability to diagnose. Your investigative help would be very much appreciated.
Thank you,
Ernie