Just a little portion of my startup log:

[19:17:03] [Client thread/ERROR] [jei]: Failed to register mod plugin: class com.phylogeny.extrabitmanipulation.api.jei.JustEnoughItemsPlugin
java.lang.NoClassDefFoundError: mezz/jei/util/CycleTimer
at com.phylogeny.extrabitmanipulation.api.jei.icon.CategoryIconList.(CategoryIconList.java:24) ~[CategoryIconList.class:?]
at com.phylogeny.extrabitmanipulation.api.jei.shape.ShapeInfoRecipeCategory.(ShapeInfoRecipeCategory.java:28) ~[ShapeInfoRecipeCategory.class:?]
at com.phylogeny.extrabitmanipulation.api.jei.JustEnoughItemsPlugin.register(JustEnoughItemsPlugin.java:45) ~[JustEnoughItemsPlugin.class:?]
at mezz.jei.startup.JeiStarter.registerPlugins(JeiStarter.java:151) [JeiStarter.class:?]
at mezz.jei.startup.JeiStarter.start(JeiStarter.java:52) [JeiStarter.class:?]
at mezz.jei.startup.ProxyCommonClient.loadComplete(ProxyCommonClient.java:117) [ProxyCommonClient.class:?]
at mezz.jei.JustEnoughItems.loadComplete(JustEnoughItems.java:54) [JustEnoughItems.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_121]
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:641) [FMLModContainer.class:?]
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_121]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) [guava-17.0.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) [guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) [guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) [guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) [guava-17.0.jar:?]
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:246) [LoadController.class:?]
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:224) [LoadController.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_121]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) [guava-17.0.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) [guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) [guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) [guava-17.0.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) [guava-17.0.jar:?]
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:147) [LoadController.class:?]
at net.minecraftforge.fml.common.Loader.initializeMods(Loader.java:836) [Loader.class:?]
at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:350) [FMLClientHandler.class:?]
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:521) [bes.class:?]
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:352) [bes.class:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [Main.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_121]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
Caused by: java.lang.ClassNotFoundException: mezz.jei.util.CycleTimer
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_121]
... 43 more
Caused by: java.lang.NullPointerException
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_121]
... 43 more

Thank you. The cause of this error is explained in mezz/JustEnoughItems#799.