Problem with beanutils after upgrading 7.0.5 -> 7.5.0

Hi,
after upgrading five of our OpenCms-Servers from 7.0.5 to 7.5.0, three of them throw the following exception when entering certain modules (e.g. flex cache) of the admin area. There is no particular difference between them, all servers run on GenToo Linux with Sun JDK 6, Tomcat 6 and PostgreSQL 8.

We also had this issue with one of our OpenCms test servers running on Windows XP with the same config as above.

We already played around with the commons-beanutils-1.x jar files, but no success.

Any ideas on this would be very appreciated.

Thanks in advance,
Roman


thrown Exception:

Jun 25, 2009 1:50:35 PM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NoSuchMethodError: org.apache.commons.beanutils.MethodUtils.getAccessibleMethod(Ljava/lang/Class;Ljava/lang/reflect/Method;)Ljava/lang/reflect/Method;
        at org.apache.commons.beanutils.PropertyUtilsBean.getReadMethod(PropertyUtilsBean.java:1247)
        at org.apache.commons.beanutils.PropertyUtilsBean.isReadable(PropertyUtilsBean.java:1426)
        at org.opencms.workplace.CmsWidgetDialogParameter.<init>(CmsWidgetDialogParameter.java:298)
        at org.opencms.workplace.CmsWidgetDialogParameter.<init>(CmsWidgetDialogParameter.java:247)
        at org.opencms.workplace.CmsWidgetDialogParameter.<init>(CmsWidgetDialogParameter.java:209)
        at org.opencms.workplace.tools.cache.CmsImageCacheClearDialog.defineWidgets(CmsImageCacheClearDialog.java:179)
        at org.opencms.workplace.CmsWidgetDialog.initWorkplaceRequestValues(CmsWidgetDialog.java:1510)
        at org.opencms.workplace.CmsWorkplace.initWorkplaceMembers(CmsWorkplace.java:1955)
        at org.opencms.workplace.tools.cache.CmsImageCacheClearDialog.initWorkplaceMembers(CmsImageCacheClearDialog.java:208)
        at org.opencms.workplace.CmsWorkplace.<init>(CmsWorkplace.java:259)
        at org.opencms.workplace.tools.CmsToolDialog.<init>(CmsToolDialog.java:94)
        at org.opencms.workplace.CmsDialog.<init>(CmsDialog.java:268)
        at org.opencms.workplace.CmsWidgetDialog.<init>(CmsWidgetDialog.java:154)
        at org.opencms.workplace.tools.cache.CmsImageCacheClearDialog.<init>(CmsImageCacheClearDialog.java:76)
        at org.opencms.workplace.tools.cache.CmsImageCacheClearDialog.<init>(CmsImageCacheClearDialog.java:89)
        at org.apache.jsp.WEB_002dINF.jsp.offline.system.workplace.admin.cache.images_005fflush_jsp._jspService(images_005fflush_jsp.java:57)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
        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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
        at org.opencms.flex.CmsFlexRequestDispatcher.forward(CmsFlexRequestDispatcher.java:117)
        at org.opencms.loader.CmsJspLoader.load(CmsJspLoader.java:509)
        at org.opencms.loader.CmsResourceManager.loadResource(CmsResourceManager.java:964)
        at org.opencms.main.OpenCmsCore.showResource(OpenCmsCore.java:1524)
        at org.opencms.main.OpenCmsServlet.doGet(OpenCmsServlet.java:152)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
        at org.opencms.flex.CmsFlexRequestDispatcher.forward(CmsFlexRequestDispatcher.java:117)
        at org.opencms.util.CmsRequestUtil.forwardRequest(CmsRequestUtil.java:461)
        at org.opencms.workplace.tools.CmsToolManager.jspForwardPage(CmsToolManager.java:482)
        at org.opencms.workplace.administration.CmsAdminDialog.displayDialog(CmsAdminDialog.java:100)
        at org.apache.jsp.WEB_002dINF.jsp.offline.system.workplace.views.admin.admin_002dmain_jsp._jspService(admin_002dmain_jsp.java:57)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
        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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
        at org.opencms.loader.CmsJspLoader.load(CmsJspLoader.java:509)
        at org.opencms.loader.CmsResourceManager.loadResource(CmsResourceManager.java:964)
        at org.opencms.main.OpenCmsCore.showResource(OpenCmsCore.java:1524)
        at org.opencms.main.OpenCmsServlet.doGet(OpenCmsServlet.java:152)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
        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)