RS in translation tool next/back button

RedScreen on vilbert (tomcat2) 8.4.3
2013-08-28 13:51:08,530 [TP-Processor6] ERROR OLATRuntimeException - OLAT::ERROR ^% N2-E5 ^% org.olat.core.logging ^%
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.57 Safari/537.36 ^%
*RedScreen* Index: 14, Size: 12 ::_::
<dispatchinfo>
<componentinfo>
<compname>ffo_main_translationToolI18nItemEdit</compname>
<compclass>org.olat.core.gui.components.form.flexible.impl.FormWrapperContainer</compclass>
<extendedinfo></extendedinfo>
<event>
<class>org.olat.core.gui.components.form.flexible.impl.FormEvent</class>
<command>done</command>
<tostring>com:done,org.olat.core.gui.components.form.flexible.impl.FormEvent@2f23a1</tostring>
</event>
</componentinfo>
<controllerinfo>
<controllername>org.olat.core.util.i18n.ui.TranslationToolI18nItemEditCrumbController</controllername>
<controllername>org.olat.core.util.i18n.ui.TranslationToolI18nItemListCrumbController</controllername>
<controllername>org.olat.core.util.i18n.ui.TranslationToolStartCrumbController</controllername>
<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappPopupBrowserWindow</controllername>
<controllername>org.olat.core.commons.chiefcontrollers.BaseChiefController</controllername>
</controllerinfo>
</dispatchinfo>
>>> stack of 1.cause::org.olat.core.logging.OLATRuntimeException: Index: 14, Size: 12
-> at org.olat.core.gui.exception.ExceptionWindowController.<init>(ExceptionWindowController.java:107)
at org.olat.core.gui.exception.MsgFactory.createMessageChiefController(MsgFactory.java:57)
at org.olat.core.gui.exception.MsgFactory.createMessageChiefController(MsgFactory.java:46)
at org.olat.core.gui.components.Window.dispatchRequest(Window.java:508)
at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:226)
at org.olat.core.gui.components.Component.dispatchRequest(Component.java:192)
at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:227)
at org.olat.core.dispatcher.DispatcherAction.execute(DispatcherAction.java:154)
at org.olat.core.servlets.OLATServlet.doPost(OLATServlet.java:155)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at org.olat.core.servlets.OLATServlet.service(OLATServlet.java:112)
>>> stack of 2.cause::java.lang.IndexOutOfBoundsException: Index: 14, Size: 12
-> at java.util.LinkedList.entry(LinkedList.java:382) at java.util.LinkedList.get(LinkedList.java:332)
at org.olat.core.util.i18n.ui.TranslationToolI18nItemEditCrumbController.doNext(TranslationToolI18nItemEditCrumbController.java:340)
at org.olat.core.util.i18n.ui.TranslationToolI18nItemEditCrumbController.formInnerEvent(TranslationToolI18nItemEditCrumbController.java:438)
at org.olat.core.gui.components.form.flexible.impl.FormBasicController.event(FormBasicController.java:342)
at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:195)
at org.olat.core.gui.components.Component$1.run(Component.java:238)
at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
at org.olat.core.gui.components.Component.fireEvent(Component.java:235)
at org.olat.core.gui.components.form.flexible.impl.FormWrapperContainer.fireFormEvent(FormWrapperContainer.java:124)
at org.olat.core.gui.components.form.flexible.impl.Form.fireFormEvent(Form.java:739)