Attaching a Vacuum Hopper to a vanilla Hopper causes a server crash. Before you say, "why would you do that" it wasn't me, but was one of my players :) Here's the crash log.

http://pastebin.ca/2694024

Server boots up and goes into endless crash loop if chunk is loaded. Only way to fix is remove block via WorldEdit from a remote location.

ie.

//pos1 1171,65,2908
//pos2 1171,65,2908
//set 0

MCPC+ specific crash. There is probably no way we can fix that on our side. Also, we simply don't support that setup.

Duplicates: #332, #326, #323