rolling machine problem

[_N_3_R_O_]

Title: rolling machine problem

Version: 3.0.3/3.0.4

OS: mac os x 10.7.4

Java Version: dont know how to check

Description of Problem:

when i try to make a rolling machine on my server it kicks me out and says end of stream.

Error Messages:

end of stream

Error Log:

20:23:26 [sEVERE] java.lang.NullPointerException

20:23:26 [sEVERE] 	at net.minecraft.server.ItemStack.setData(ItemStack.java:153)

20:23:26 [sEVERE] 	at net.minecraft.server.ItemStack.<init>(ItemStack.java:39)

20:23:26 [sEVERE] 	at net.minecraft.server.Packet.b(Packet.java:160)

20:23:26 [sEVERE] 	at net.minecraft.server.Packet102WindowClick.a(SourceFile:38)

20:23:26 [sEVERE] 	at net.minecraft.server.Packet.a(Packet.java:83)

20:23:26 [sEVERE] 	at net.minecraft.server.NetworkManager.h(NetworkManager.java:152)

20:23:26 [sEVERE] 	at net.minecraft.server.NetworkManager.c(NetworkManager.java:273)

20:23:26 [sEVERE] 	at net.minecraft.server.NetworkReaderThread.run(SourceFile:76)

20:23:26 [iNFO] _N_3_R_O_ lost connection: disconnect.genericReason

>