@Kumasasa And what about everything that's been built by all the members of the server? Just start over?
@Kumasasa a 1.7 snapshot. Server map created with 13w41b, updated to 13w42a, and then 1.7.1.
I'm still seeing this issue in 1.7.1. Arrows that got stuck in a previous version are not despawning now.
@Kumasasa This should be able to be fixable. Opening the world in 1.6.4, the arrows despawn properly. But reopening the world in 1.7.1 brings the arrows back.