Lost 10 points for seemingly no reason..

[MtnManiacX]

We were in the 8th round and I had 93 victory points. Then, from one agent-move to the next, I mysteriously lost 10 points. Nobody could figure out why. Looking at the game history there is no card played from 1 turn to the next that would have removed any points. I have a screen-shot of the history log, but I can't figure out how to post the pic here. Is this a known issue? Anyone have any ideas?

[Chadworthy]

If the corruption track is empty (no skulls left, -9 showing in the last spot) receiving an additional skull grants an immediate -10 points.

[Glennovich]

It was not because the corruption tree was empty, and someone played the intrigue card giving anyone with more corruption them themselves another corruption? In such case 10 points are removed instead as there is no more corruption to hand out.

[Steve]

That will get you an achievement as well.

[MtnManiacX]

That was it guys! Thanks! I found it in my paper rulebook from the physical game. It would have helped a lot if there was a "negative" VP-jewel-icon in the history for that round. They show icons when you gain VP, but why not when you lose it. That made it really confusing. Thanks again!