Question owners should be able to see the vote breakdowns on answers to their questions only, regardless of reputation.
I understand that this information is restricted because of (a) server load and (b) new-user drama, but can we make an exception for the one person involved in a post who has the most to gain from the knowledge?
When I ask a question on a site where I don't have the rep to see vote breakdowns, I can't tell (unless there's discussion in comments) whether that plausible-looking answer is really +4 or, rather, +10/-6. As someone considering implementation based on the answers I get, that seems like a pretty important difference.
This is not the same as enabling low-rep users to easily breakout up and down votes on their own questions.