Bukkit should stop being so dumb. They literally have to almost rewrite their entire code every time Minecraft updates, even though there's lots of better ways to do it which makes it take about 2 hours instead of 100. But no, they insist on doing things the hard way so they can whine all day about how much time it costs.
They're also stubborn as a mule, and contradict themselves every other day. They say they want a Vanilla Minecraft experience, yet they provide an API which allows for some heavy modding.