Have you checked the Data Binding settings on the Object-Binding tab?
That's definitely not something I've ever looked at, and the form has worked in the past and I've never changed it...
Looks like it's the issue though - it currently says No data binding, I'm guessing I should set it to Use Name (Field Name)... Not got a clue what the other options mean, but is that the cause? (I don't want to try changing them all just to find out it's wrong)
Yup! No Data Binding means that data won't go anywhere. Just be careful about collisions with Use Name if you have fields with the same name
Any idea what may have caused them to change to No Data Binding?
No clue as to why/how they might change, especially without knowing your work.
My experience is that it takes a lot more time to figure out why something happened than it does to fix it.
Not the best attitude for prevention, I realize, but most of the time I just gotta move on and keep working!
Nope, you're right... I work in IT so have to accept that attitude a lot sometimes...
Thanks for helping though! :-)