[Seasar-user:14393] [Teeda]バージョンアップによりConcurrentModificationExceptionが発生？

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いつもお世話になっております。
ためやすと申します。

バージョンアップ関連でこれまでにも何度か質問させて
いただいております。

みなさまに色々とご指導いただき大変助かっております！

が、今回、新たに問題が発生しました。

S2プロダクトのバージョンを、

・Seasar：2.4.11
・Teeda：1.0.6
・S2Dao：1.0.40

から

・Seasar：2.4.24
・Teeda：1.0.13
・S2Dao：1.0.47

に変更したところ、以下のエラーが頻発するようになりました。

毎回初歩的な質問で申し訳ないのですが、何か原因は
分かりますでしょうか？
調査のために必要な情報などありましたら、補足いたしますので
ご指摘下さい。

＜エラーの内容＞
DEBUG 2008-05-22 14:24:02,144 [http-8080-Processor23] 
java.util.ConcurrentModificationException
	at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:365)
	at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:384)
	at java.util.LinkedHashMap$EntryIterator.next(LinkedHashMap.java:383)
	at java.util.HashMap.writeObject(HashMap.java:1037)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:917)
	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1339)
	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
	at org.seasar.teeda.core.util.ObjectOutputStreamUtil.writeObject(ObjectOutputStreamUtil.java:42)
	at org.seasar.teeda.core.render.Base64EncodeConverter.getAsEncodeString(Base64EncodeConverter.java:52)
	at org.seasar.teeda.extension.util.ConditionUtil$ConditionRendererListener.renderJavascript(ConditionUtil.java:182)
	at org.seasar.teeda.extension.util.ConditionUtil$ConditionRendererListener.renderBeforeBodyEnd(ConditionUtil.java:139)
	at org.seasar.teeda.extension.render.TBodyRenderer.encodeEnd(TBodyRenderer.java:85)
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:348)
	at org.seasar.teeda.core.util.RendererUtil.renderChild(RendererUtil.java:330)
	at org.seasar.teeda.core.util.RendererUtil.renderChildren(RendererUtil.java:340)
	at org.seasar.teeda.extension.render.TViewRootRenderer.encodeBegin(TViewRootRenderer.java:65)
	at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:330)
	at javax.faces.component.UIViewRoot.encodeBegin(UIViewRoot.java:100)
	at javax.faces.webapp.UIComponentTag.encodeBegin(UIComponentTag.java:247)
	at javax.faces.webapp.UIComponentTag.doStartTag(UIComponentTag.java:184)
	at org.seasar.teeda.extension.taglib.TViewTag.doStartTag(TViewTag.java:98)
	at org.seasar.teeda.extension.html.processor.ElementProcessorImpl.processTag(ElementProcessorImpl.java:145)
	at org.seasar.teeda.extension.html.processor.ElementProcessorImpl.process(ElementProcessorImpl.java:138)
	at org.seasar.teeda.extension.html.processor.ElementProcessorImpl.process(ElementProcessorImpl.java:119)
	at org.seasar.teeda.extension.html.impl.HtmlViewHandler.renderView(HtmlViewHandler.java:157)
	at org.seasar.teeda.extension.html.impl.HtmlViewHandler.renderView(HtmlViewHandler.java:143)
	at org.seasar.teeda.core.lifecycle.impl.RenderResponsePhase.executePhase(RenderResponsePhase.java:39)
	at org.seasar.teeda.core.lifecycle.AbstractPhase.execute(AbstractPhase.java:57)
	at org.seasar.teeda.core.lifecycle.LifecycleImpl.render(LifecycleImpl.java:131)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:101)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.seasar.framework.container.hotdeploy.HotdeployFilter.doFilter(HotdeployFilter.java:70)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.seasar.framework.container.filter.S2ContainerFilter.doFilter(S2ContainerFilter.java:77)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.seasar.extension.filter.EncodingFilter.doFilter(EncodingFilter.java:69)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
	at java.lang.Thread.run(Thread.java:595)