What is meta? ×  I got a heap of strange undownvotes yesterday:
enter image description here  I'm wondering how this was
possible. Were the downvotes not too old to be revoked?  The
original downvotes that were cancelled don't show up anywhere in
my list (I went back a month or so), and neither of the posts
had seen a recent edit that would have allowed the user to
change his vote.  How was the voter able to undo votes this old?
Or is this evidence of a removed user account? Do cancelled
downvotes not show the user was removed message that you see
when *up*votes get cancelled?  share|improve this question Maybe
a serial downvoting reversal? –  Lamak Nov 22 '12 at 19:20
serial downvoting reversal is not marked as "undownvote". – 
juergen d Nov 22 '12 at 19:22 I've seen this happen where it
doesn't use the proper reversal event at 03:00, but it usually
only occurs when there's just a few events that get reversed.
Never seen it for a huge block of them before. The events did
occur at 03:00 so that automated sc