> **Possible Duplicate:**  
> [Should I be able to cancel my up-vote on a comment?](https://meta.stackexchange.com/questions/1170/should-i-be-able-to-cancel-my-up-vote-on-a-comment)  


Can't undo upvote on comments. The comments area understandably has a small interface and I accidentally upvoted the wrong comment. Apparently they cannot be un-upvoted.