UV Summaries can get out of sync from actual values

(Bug, Closed -> Fixed, Priority: High, Test Status: No automated tests yet , Reported By Justin du Coeur, )
User Values
Summary: Due to the way Summaries work, they can get out of sync if they are added/removed after User Values are added. More importantly, there is no way to resynchronize them, even manually, with any confidence.
The resync is really the important part -- as always, we should be shooting for eventual consistency. Ideally this situation would never happen, but we need to provide a mechanism to bring the stats in line with reality if it does. Manual process? Should we check it when we load, eg, _userValues and have all the data to hand anyway?