I’m just saying that it is intentional that you can’t vote on the comments on someone’s profile page. (I found the relevant entry in the issue tracker.)
I was about to say that if sometimes the buttons do appear then it’s a bug, but it turns out that this behavior has been changed:
Users with sufficient karma can downvote on the userpages of people with less than a certain percentage upvotes.
I’m just saying that it is intentional that you can’t vote on the comments on someone’s profile page. (I found the relevant entry in the issue tracker.)
I was about to say that if sometimes the buttons do appear then it’s a bug, but it turns out that this behavior has been changed: