[06:39:13] [Server thread/ERROR] [FML]: A fatal exception occurred during the server starting event
cpw.mods.fml.common.LoaderException: java.lang.NoSuchMethodError: net.minecraft.item.Item.func_150895_a(Lnet/minecraft/item/Item;Lnet/minecraft/creativetab/CreativeTabs;Ljava/util/List;)V
at cpw.mods.fml.common.LoadController.transition(LoadController.java:162) ~[LoadController.class:?]
at cpw.mods.fml.common.Loader.serverStarting(Loader.java:739) [Loader.class:?]
at cpw.mods.fml.common.FMLCommonHandler.handleServerStarting(FMLCommonHandler.java:278) [FMLCommonHandler.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:256) [lj.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374) [MinecraftServer.class:?]
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:670) [kx.class:?]
Caused by: java.lang.NoSuchMethodError: net.minecraft.item.Item.func_150895_a(Lnet/minecraft/item/Item;Lnet/minecraft/creativetab/CreativeTabs;Ljava/util/List;)V
at mariculture.factory.UnpackerHelper.load(UnpackerHelper.java:38) ~[UnpackerHelper.class:?]
at mariculture.Mariculture.onServerStarting(Mariculture.java:71) ~[Mariculture.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_55]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_55]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_55]
at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_55]
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:513) ~[FMLModContainer.class:?]
at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_55]
at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_55]
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74) ~[minecraft_server.1.7.2.jar:?]
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:47) ~[minecraft_server.1.7.2.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314) ~[minecraft_server.1.7.2.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296) ~[minecraft_server.1.7.2.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:267) ~[minecraft_server.1.7.2.jar:?]
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:208) ~[LoadController.class:?]
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187) ~[LoadController.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_55]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_55]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_55]
at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_55]
at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74) ~[minecraft_server.1.7.2.jar:?]
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:47) ~[minecraft_server.1.7.2.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314) ~[minecraft_server.1.7.2.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296) ~[minecraft_server.1.7.2.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:267) ~[minecraft_server.1.7.2.jar:?]
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:118) ~[LoadController.class:?]
at cpw.mods.fml.common.Loader.serverStarting(Loader.java:738) ~[Loader.class:?]
... 4 more

Considering I say not to use on servers 👍

Thanks for the report. Should be fixed in build 12.