RedPower 2 Frame Crash

2013-04-03 18:52:53 [INFO] [STDERR] java.lang.IndexOutOfBoundsException
2013-04-03 18:52:53 [INFO] [STDERR] 	at com.eloraam.redpower.core.ItemExtended.d(ItemExtended.java:33)
2013-04-03 18:52:53 [INFO] [STDERR] 	at up.i(Item.java:458)
2013-04-03 18:52:53 [INFO] [STDERR] 	at up.l(Item.java:600)
2013-04-03 18:52:53 [INFO] [STDERR] 	at ur.r(SourceFile:334)
2013-04-03 18:52:53 [INFO] [STDERR] 	at atr.a(GuiIngame.java:406)
2013-04-03 18:52:53 [INFO] [STDERR] 	at ban.b(EntityRenderer.java:1129)
2013-04-03 18:52:53 [INFO] [STDERR] 	at net.minecraft.client.Minecraft.J(Minecraft.java:884)
2013-04-03 18:52:53 [INFO] [STDERR] 	at net.minecraft.client.Minecraft.run(Minecraft.java:773)
2013-04-03 18:52:53 [INFO] [STDERR] 	at java.lang.Thread.run(Unknown Source)