It's true, the 880 dock was horribly designed (the worst I have ever seen for any kind of charger for any kind of product). However, someone here said that they did improve it at some point, but I don't know how you guys will figure that out.
Perhaps an email to Harmony support, with the serial number of the unit could lead to information.
EDIT: and if it happens to have one of the badly designed chargers, maybe they will send a better one out for free?