1. Nice. So you created the table "qa_votes_eventlog" =)
2. Ah, now I see. From the screenshot in your answer I thought you could revert a vote or so...
Looking forward to your release.
***PS: If a q2a forum installs your plugin, can it calculate backwards all points etc.? I run into a similar problem with the "best users" plugin, the *total points* are stored with the first install, later on the real events. It cannot go back in history.