Un-Upvoting Comments
49841
Cancelling upvote on comment?
138588
Dealing with what's perceived to be an offensive comment
112477
How to deal with downvoting sock puppets?
47699
Unexplainable upvotes
155573
Who feels that down-voting is used destructively on Stack Overflow?
116791
Cannot favorite once up voted
114487
Cannot up vote a comment on iOS app
116782
Election comments have no permalink link
21627
How many upvotes have I received on my comments?
42659
Proposal to solve the Uncommented Downvote problem
22027
What can I do if I'm the victim of serial downvoting?
38709
How to prevent negative comments/downvoted being deleted by re-posting answers
11134
I've just been downvoted. How should I react?
78594
Downvotes and close of beginner question
132117
Does upvoting a duplicate comment do anything?
121083
Unupvote immediately followed by an upvote gives me a net -10 reputation points
25930
"undo your comment upvote" is missing in app?