tekkit error

[benbmw]

Hi i have a tekkit server and this error has been spaming the console for a while

09.08 11:45:55 [server] SEVERE at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

09.08 11:45:55 [server] SEVERE at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

09.08 11:45:55 [server] SEVERE at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:565)

09.08 11:45:55 [server] SEVERE at net.minecraft.server.World.doTick(World.java:1771)

09.08 11:45:55 [server] SEVERE at net.minecraft.server.World.save(World.java:263)

09.08 11:45:55 [server] SEVERE at net.minecraft.server.ChunkProviderServer.saveChunks(ChunkProviderServer.java:221)

09.08 11:45:55 [server] SEVERE at net.minecraft.server.ChunkProviderServer.saveChunk(ChunkProviderServer.java:171)

09.08 11:45:55 [server] SEVERE at net.minecraft.server.ChunkRegionLoader.a(ChunkRegionLoader.java:88)

09.08 11:45:55 [server] SEVERE at net.minecraft.server.ChunkRegionLoader.a(ChunkRegionLoader.java:214)

09.08 11:45:55 [server] SEVERE at ccSensors.shared.TileEntityComputerSensor.b(TileEntityComputerSensor.java:444)

09.08 11:45:55 [server] SEVERE at net.minecraft.server.NBTTagCompound.setString(NBTTagCompound.java:95)

09.08 11:45:55 [server] SEVERE at net.minecraft.server.NBTTagString.<init>(SourceFile:15)

09.08 11:45:55 [server] SEVERE java.lang.IllegalArgumentException: Empty string not allowed

and that just repeats its self constantly.

another problem im having is after any command ingame or from the console or even from plugins like automessage it adds [m i dont know why but it does. any help?