NinjaWolf/CraftBukkit — pull request #1 by NinjaWolf (2012-10-15 01:19:03+00:00)
Title: Fix clientside sign blanking

If a block break on a sign or mob spawner was cancelled, the client would
display an empty sign or a pig spawner in its place. This fixes that issue
by re-sending any additional tile-entity data whenever it re-sends a block
that is not known to not be a tile entity.