I'm just now looking at my recent reputation changes and I see eight downvotes on various different answers I posted over seemingly one single day.
I'm wondering if this is serial downvoting by a single user (who I presumably must have offended somehow?) or just some odd coincidence.
Not sure if this can kind of activity be "flagged" or not. It's not urgent, but is somewhat annoying to me and I curious how best to deal with it.
Update: The serial downvoting has been reversed.