From Michael Cook on IdeaScale. Add a directive #alwayssolve which would cause solve attempts for all data images even if the first one failed to solve. Rob Capon really pleaded for this to be a setting. I finally gave in :-)
Bumping the priority. This is going to be in 7.2.
Now it is easier to do API changes (ACP 7.1) but I needed to drop this for getting this out!!!
This will require an API change, so it's off the list till a major rev of ACP. Estimated completion time has been updated. I have fed back the considerations and issues so read this before doing it: http://forums.dc3.com/showthread.php?7456-Always-Plate-Solve-Final-Image&p=43024#post43024
REOPENED: See this Comm Center Thread, and specifically the suggestion by Rob Capon in this Comm Center post. He suggests that it be another checkbox item.