I've already seen several questions about this, but none (I could find) cover the new beta review system.
When I review content on review beta, sometimes it comes back again. I only noticed it because of the new auto-comment feature. I got some answers I'd already reviewed/posted comments on less than ten minutes earlier to review.
Shouldn't there be something set up to not have the same reviewer review the same post when there are 46 thousand other low-quality posts? I love using review to help clean the site up, but it's hard to get the warm fuzzies when I keep getting the same stuff back.
Okay, now there are only 36 thousand low-quality posts. But if we fixed this, maybe we'd be done already! I just went through a few hundred posts and it wasn't uncommon for me to see that one or two other reviewers had already commented (probably at least 20%).