Issue voting needs to be more prominent.
The purpose of having voting on issues is so that users who are tempted to post "+1" comments will refrain from doing so. But right now, the "Vote for this issue" tag is so well hidden that you'd never know it was there unless you were looking for it.
It's on a panel off to the right (a place we're generally trained not to look, since that's where ads tend to be), and it's in the middle of a bunch of other text. It should be at the top of the issue, among the actual information about the issue.