After further investigation, here is what is really happening:

Start system and run Form A. Changes are saved normally using a view and tableupdate().

Run Form B. This form updates the same base table as Form A but not as a view. It works fine.

Run Form A again. Now, the changes do not save. Here is the code:
x=tableupdate(.t.)
browse && the changes are there.
requery()
browse && the changes are gone.

So, it appears that the requery() is not working for some reason after Form B is run. The client tells me that changes do not get saved even if Form B is not run but I can't get this to fail.

Thanks for your help,

Robert