Chunk reset by secret door?

[Andybish]

I recently restarted my Big Dig server (latest version) and found that the chunk containing all mine and my friends' items had reset to a brand new chunk with a different seed. Looking at the server's FML logfile, the only thing different between this server start and the previous one is an error given below.

2013-10-13 20:37:58 [iNFO] [Minecraft-Server] Preparing level "world"

2013-10-13 20:37:58 [FINE] [fml.ItemTracker] The difference set is equal

2013-10-13 20:37:58 [iNFO] [ForgeModLoader] Loading dimension 0 (world) (net.minecraft.server.dedicated.DedicatedServer@789198a)

2013-10-13 20:37:58 [iNFO] [ForgeModLoader] Loading dimension -23 (world) (net.minecraft.server.dedicated.DedicatedServer@789198a)

2013-10-13 20:37:58 [iNFO] [ForgeModLoader] Loading dimension 1 (world) (net.minecraft.server.dedicated.DedicatedServer@789198a)

2013-10-13 20:37:59 [iNFO] [ForgeModLoader] Loading dimension -1 (world) (net.minecraft.server.dedicated.DedicatedServer@789198a)

2013-10-13 20:37:59 [iNFO] [sTDERR] java.lang.NullPointerException

2013-10-13 20:37:59 [iNFO] [sTDERR]    at com.github.AbrarSyed.secretroomsmod.blocks.TileEntityCamo.func_70312_q(TileEntityCamo.java:109)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.world.chunk.Chunk.func_76604_a(Chunk.java:1040)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.world.chunk.Chunk.func_76620_a(Chunk.java:1013)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75823_a(AnvilChunkLoader.java:442)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75822_a(AnvilChunkLoader.java:103)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.world.chunk.storage.AnvilChunkLoader.func_75815_a(AnvilChunkLoader.java:83)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.world.gen.ChunkProviderServer.func_73239_e(ChunkProviderServer.java:182)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.world.gen.ChunkProviderServer.func_73158_c(ChunkProviderServer.java:118)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.world.gen.ChunkProviderServer.func_73154_d(ChunkProviderServer.java:166)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.world.World.func_72964_e(World.java:528)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.world.World.func_72798_a(World.java:413)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at buildcraft.BuildCraftFactory$QuarryChunkloadCallback.ticketsLoaded(BuildCraftFactory.java:116)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraftforge.common.ForgeChunkManager.loadWorld(ForgeChunkManager.java:510)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraftforge.common.ForgeInternalHandler.onDimensionLoad(ForgeInternalHandler.java:64)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraftforge.event.ASMEventHandler_1_ForgeInternalHandler_onDimensionLoad_Load.invoke(.dynamic)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:35)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraftforge.event.EventBus.post(EventBus.java:103)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:251)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:186)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:430)

2013-10-13 20:37:59 [iNFO] [sTDERR]    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)

2013-10-13 20:37:59 [iNFO] [sTDOUT] Registering Pocket Dims

2013-10-13 20:37:59 [iNFO] [sTDOUT] Loading DimDoors data

2013-10-13 20:37:59 [iNFO] [Minecraft-Server] Preparing start region for level 0