Exception when opening preferences

2009-05-20 13:18:24,200 ERROR -
com.intellij.ide.IdeEventQueue - Error during dispatching of
java.awt.event.MouseEvent[MOUSE_RELEASED,(702,66),absolute(702,91),button=1,modifiers=Button1,clickCount=1]
on frame0
java.lang.IndexOutOfBoundsException: Index: 2, Size: 1
at java.util.ArrayList.add(ArrayList.java:367)
at
com.intellij.openapi.extensions.impl.ExtensionPointImpl.internalRegisterExtension(ExtensionPointImpl.java:115)
at
com.intellij.openapi.extensions.impl.ExtensionPointImpl.processAdapters(ExtensionPointImpl.java:202)
at
com.intellij.openapi.extensions.impl.ExtensionPointImpl.getExtensions(ExtensionPointImpl.java:150)
at
com.intellij.openapi.project.impl.ProjectImpl.getExtensions(ProjectImpl.java:92)
at
com.intellij.openapi.options.ex.ProjectConfigurablesGroup.a(ProjectConfigurablesGroup.java:1)
at
com.intellij.openapi.options.ex.ProjectConfigurablesGroup.getConfigurables(ProjectConfigurablesGroup.java:20)
at
com.intellij.ide.actions.ShowSettingsUtilImpl.a(ShowSettingsUtilImpl.java:42)
at
com.intellij.ide.actions.ShowSettingsUtilImpl.a(ShowSettingsUtilImpl.java:62)
at
com.intellij.ide.actions.ShowSettingsUtilImpl.showSettingsDialog(ShowSettingsUtilImpl.java:17)
at
com.intellij.ide.actions.ShowSettingsAction.actionPerformed(ShowSettingsAction.java:3)
at
com.intellij.openapi.actionSystem.impl.ActionButton.a(ActionButton.java:68)
at
com.intellij.openapi.actionSystem.impl.ActionButton.a(ActionButton.java:64)
at
com.intellij.openapi.actionSystem.impl.ActionButton.processMouseEvent(ActionButton.java:127)
at java.awt.Component.processEvent(Component.java:5981)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4583)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4413)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4556)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4220)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4150)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4413)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at com.intellij.ide.IdeEventQueue.d(IdeEventQueue.java:53)
at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:140)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:129)
at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
2009-05-20 13:18:24,201 ERROR -
com.intellij.ide.IdeEventQueue - JetBrains RubyMine 1.0.5 Build #907
2009-05-20 13:18:24,201 ERROR -
com.intellij.ide.IdeEventQueue - JDK: 1.6.0_13
2009-05-20 13:18:24,201 ERROR -
com.intellij.ide.IdeEventQueue - VM: Java HotSpot(TM) 64-Bit Server VM
2009-05-20 13:18:24,201 ERROR -
com.intellij.ide.IdeEventQueue - Vendor: Sun Microsystems Inc.
2009-05-20 13:18:24,201 ERROR -
com.intellij.ide.IdeEventQueue - OS: Linux
2009-05-20 13:18:24,201 ERROR -
com.intellij.ide.IdeEventQueue - Last Action: ShowSettings