When someone comments to a reply or submission and I check it in my mailbox it would nice to be able to upvote from that page instead of having to go to the thread and upvote from there.
Appreciate the admins on this site and the open dialogue you've created here.
Great request. I thought about this too and often wondered why it wasn't an option, but was too lazy to ask. It does get to be a pain when you just want to up vote someone's comment, but not necessarily comment yourself, to have to go to the thread to do so.