So far I have found 3. Maybe somebody can reproduce them?
1)If the setting are change in any manner, clocking about shows the program as unregistered. Exiting it and restarting fixes it and the setting stay the way you wanted.
2) Well, not exactly the way you wanted. The short format for the date does not seem to work. I tried all kinds of combos to no avail.
3) if your task bar is unlocked, make it vertical. Chronograph is there, because the calendar and the settings pop up, but you can't see the time.
-Mario