Hi Bill,
A quick update on this, I just fixed it in my copy. It turned out that was actually saving it correctly, the bug is that it wasn't correctly checking the box for All Users in the UI even though it should. So it is really a display bug rather than a case where it is not saving.
So the problem is that it isn't checking the box for all users when it should so if you accidently save it without checking it it would lose that setting, but if you do check it before saving it is saving it, but it isn't correctly showing it as checked in the UI.
Best,
Joe