This seems to provide only a partial fix. If I create a group and then drill into the group, the units are back to centimeters. I can change the units in the drilled-down state, but when I exit and return to the next level up, that decision is lost. When I drill down again, it's back to centimeters.

Units should be a user defined program setting. In fact, the Options dialog should be available when no file is open and whatever the settings made in that state should be the defaults for all future documents unless a template has overriding settings. No?

- Bal