.downvote { display: none !important; }
.downvote, .c-downvote { display: none !important; }
if you want comments included too.
There is a problem. Your code makes both buttons disappear for posts.
hmm, it shouldnt. The container for the upvote button has the class .upvote and the parent container for both is .votebuttons. I'll have to install stylish and test it.
Thanks
This guy CSSes
(post is archived)