I just saw some downvoting activity on many questions I answered (see here), not long after I answered this. Is there anything I can do ?
EDIT Ok, so MSE has correctly reversed thing during night, but things seem to continue this morning (reputation). But of course, I have no more proof than yesterday. And with the added benefit that moderate downvoting has more chances to look normal (after all, somebody may perfectly well dislike these two posts). Nice.