Illarion.org

Hallo, bin in der Schmiede und will ein Schwert schmieden. Wenn ich den Amboss selektiere und dann das Schwert, stürtzt der Client ab mit der Meldung:
A technical problem has occured, check log files for details.

Das error log zeigt:

Illarion Client V1.21 started Mon Jul 20 19:37:25 CEST 2009
LWJGL: 6.0.6001.18000
VM: 1.6.0_13
OS: Windows Vista 6.0 x86
java.lang.IllegalArgumentException: only two uses are supported
at illarion.client.net.client.UseCmd.addUse(UseCmd.java:68)
at illarion.client.gui.menu.SelectionMenu.selectEntry(SelectionMenu.java:189)
at illarion.client.gui.menu.MenuSlot.lookAt(MenuSlot.java:53)
at illarion.client.gui.InputManager.mainAction(InputManager.java:500)
at illarion.client.gui.MouseHandler.handleButtonUp(MouseHandler.java:141)
at illarion.client.gui.MouseHandler.handle(MouseHandler.java:116)
at illarion.client.gui.InputManager.handle(InputManager.java:276)
at illarion.client.gui.Gui.handleInput(Gui.java:201)
at illarion.client.world.Game.gameLoop(Game.java:234)
at illarion.client.IllaClient.<init>(IllaClient.java:164)
at illarion.client.IllaClient.main(IllaClient.java:612)
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 com.sun.javaws.Launcher.executeApplication(Unknown Source)
at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Fatal error: A technical problem has occurred.
Check logfiles for details.
Terminating client!

Was kann ich tun?