I asked this question yesterday in a comment and someone pointed me to read FAQ.<p>Well, I did. There's something about 'preventing from abuse'. How come all of my up-votes considered as abuse? I mean, I can't upvote <i>any</i> comment here.
I had this on occasion (one reason I now only upvote and downvote very rarely now) in the past - and know a large number of regulars have too.<p>Im guessing the formula is just throwing a false positive; you will get it back in a few days.<p>pg has never explicitly commented on what constitutes "abuse" in the mind of the system - I assume to avoid gaming/avoidance :)