Letter Crash

---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 15/07/14 21:13
Description: Updating screen events

java.lang.IllegalArgumentException: Name and ID cannot both be blank
	at com.mojang.authlib.GameProfile.<init>(GameProfile.java:25)
	at forestry.mail.gui.GuiLetter.setRecipient(GuiLetter.java:234)
	at forestry.mail.gui.GuiLetter.func_146281_b(GuiLetter.java:209)
	at net.minecraft.client.Minecraft.func_147108_a(Minecraft.java:780)
	at net.minecraft.client.entity.EntityPlayerSP.func_71053_j(EntityPlayerSP.java:337)
	at net.minecraft.client.entity.EntityClientPlayerMP.func_92015_f(SourceFile:172)
	at net.minecraft.client.entity.EntityClientPlayerMP.func_71053_j(SourceFile:166)
	at net.minecraft.client.gui.inventory.GuiContainer.func_73869_a(GuiContainer.java:646)
	at forestry.mail.gui.GuiLetter.func_73869_a(GuiLetter.java:133)
	at net.minecraft.client.gui.inventory.GuiContainer.public_func_73869_a(GuiContainer.java)
	at codechicken.nei.guihook.GuiContainerManager.callKeyTyped(GuiContainerManager.java)
	at codechicken.nei.guihook.GuiContainerManager.keyTyped(GuiContainerManager.java:506)
	at codechicken.nei.guihook.GuiContainerManager.handleKeyboardInput(GuiContainerManager.java:496)
	at net.minecraft.client.gui.inventory.GuiContainer.func_146282_l(GuiContainer.java)
	at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:276)
	at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1628)
	at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:961)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:887)
	at net.minecraft.client.main.Main.main(SourceFile:148)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)