3. Removing the group and replacing the original ellipse object with a path object of type ellipse, fixes the orbital problem. The buttons on the path tool currently do not work, so Harpo suggests selecting the type"Ellipse" from the right-click context menu.
4. Even with this change, the starting balls still are still misplaced with respect to the box.
5. View the animations in IE8 and Firefox. In IE8, the ball's spacing in orbit is similar for each ball. In FF, it can be very different. Maybe a problem with Firefox itself?