Drop-down boxes stopped working

[Guest]

I have several drop-down boxes in a file that have stopped working. I used
them on Friday. I have not changed the location of the data referenced by
the drop-downs. As far as I know, I did not make any setting changes to
cause them to stop working. What would cause this to happen?

Thanks

 

[Guest]

If the drop down boxes were created from data validation, I've seen a problem
with freezing frames. That is, with frames frozen, my data validation drop
downs did not work.

Art