Alguem já aqui já se deparou com esse erro? Micrei uma aplicação que estava rodando normal no tomcat 5.5 para o tomcat 6, ai já na primeira tela aparece esse erro.
13/03/2009 08:30:00 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.ClassCastException: org.apache.struts.taglib.logic.IterateTei cannot be cast to javax.servlet.jsp.tagext.TagExtraInfo
	at org.apache.jasper.compiler.TagLibraryInfoImpl.createTagInfo(TagLibraryInfoImpl.java:417)
	at org.apache.jasper.compiler.TagLibraryInfoImpl.parseTLD(TagLibraryInfoImpl.java:250)
	at org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:163)
	at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:431)
	at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:494)
	at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1444)
	at org.apache.jasper.compiler.Parser.parse(Parser.java:138)
	at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:216)
	at org.apache.jasper.compiler.ParserController.parse(ParserController.java:103)
	at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:154)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:315)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:282)
	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Unknown Source)