There is no downvote for submissions; only flagging. There is a karma threshold for flagging: I think it's 200, but don't hold me to it. Edit to add: Sorry, I

There is no downvote for submissions; only flagging. There is a karma threshold for flagging: I think it's 200, but don't hold me to it. Edit to add: Sorry, I misread post to mean submission, not comment. Sibling is correct: downvoting for comments is enabled when you earn your 501st point.