Hi, we've migrated from zimbra 5.0.12 to 6.0.6, from 32 bits to 64 bits, and from single server to multiserver. Now we have one ldap master, one ldap slave, one mailbox. The new 6.0.6 enviroment started with a fresh install. We've only migrate old mails, contacts and calendar, but all configurations was made by hand. Everything works fine, but users cannot change passwords with web client.

When they go to preferences -> change password, it appears a browser window with url: http://xxxxx/h/changepass with this message:

Error interno del servidor
Ha surgido un error interno en el servidor.
Inténtalo de nuevo más tarde.
« Volver
ERROR: 500

I did tail mailbox.log -f and I found:

2010-07-06 10:49:45,431 ERROR [btpool0-186://xxxxx/h/changepass] [] log - /zimbra/h/changepass
java.lang.ClassFormatError: Unknown constant tag 111 in class file org/apache/jsp/h/changepass
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java :621)
at java.security.SecureClassLoader.defineClass(Secure ClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader .java:260)
at java.net.URLClassLoader.access$000(URLClassLoader. java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java: 195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:188)
at org.apache.jasper.servlet.JasperLoader.findClass(J asperLoader.java:204)
at org.apache.jasper.servlet.JasperLoader.loadClass(J asperLoader.java:190)
at org.apache.jasper.servlet.JasperLoader.loadClass(J asperLoader.java:122)
at org.apache.jasper.JspCompilationContext.load(JspCo mpilationContext.java:639)
at org.apache.jasper.servlet.JspServletWrapper.getSer vlet(JspServletWrapper.java:192)
at org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:372)
at org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:486)
at org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:380)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:820)
at com.zimbra.webClient.servlet.JspServlet.service(Js pServlet.java:64)
at org.mortbay.jetty.servlet.ServletHolder.handle(Ser vletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1166)
at com.zimbra.cs.servlet.SetHeaderFilter.doFilter(Set HeaderFilter.java:79)
at com.zimbra.webClient.filters.SetHeaderFilter.doFil ter(SetHeaderFilter.java:241)
at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157)
at org.mortbay.servlet.UserAgentFilter.doFilter(UserA gentFilter.java:81)
at org.mortbay.servlet.GzipFilter.doFilter(GzipFilter .java:132)
at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157)
at com.zimbra.webClient.filters.CharEncodingFilter.do Filter(CharEncodingFilter.java:35)
at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(Se rvletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle( SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(Se ssionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(Co ntextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebA ppContext.java:418)
at org.mortbay.jetty.handler.ContextHandlerCollection .handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle (HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152)
at org.mortbay.jetty.handler.rewrite.RewriteHandler.h andle(RewriteHandler.java:230)
at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152)
at org.mortbay.jetty.handler.DebugHandler.handle(Debu gHandler.java:77)
at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(Htt pConnection.java:543)
at org.mortbay.jetty.HttpConnection$RequestHandler.he aderComplete(HttpConnection.java:924)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser. java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpPa rser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnec tion.java:405)
at org.mortbay.io.nio.SelectChannelEndPoint.run(Selec tChannelEndPoint.java:409)
at org.mortbay.thread.BoundedThreadPool$PoolThread.ru n(BoundedThreadPool.java:451)

I hope you can help us, thanks for reading.