I am trying to deploy a Seam 2.0.0 application on a WebLogic 9.2 instance on a Linux server.  This application currently works on a WebLogic instance on a Windows server.  I get this error on Linux:

Apr 15, 2008 3:20:59 PM com.sun.faces.config.ConfigureListener
contextInitialized
INFO: Initializing Sun's JavaServer Faces implementation (1.2_04-b16-p02) for context 'null'
Apr 15, 2008 3:21:00 PM com.sun.faces.spi.InjectionProviderFactory
createInstance
INFO: JSF1048: PostConstruct/PreDestroy annotations present.  ManagedBeans methods marked with these annotations will have said annotations processed.
Apr 15, 2008 3:21:12 PM com.sun.faces.config.ConfigureListener
installExpressionFactory
SEVERE: Error Instantiating ExpressionFactory
java.lang.ClassNotFoundException: com.sun.el.ExpressionFactoryImpl
        at java.lang.Class.forNameImpl(Native Method)
        at java.lang.Class.forName(Class.java:127)
        at
com.sun.faces.config.ConfigureListener.installExpressionFactory(ConfigureListener.java:1521)
        at
com.sun.faces.config.ConfigureListener.registerELResolverAndListenerWithJsp(ConfigureListener.java:1545)
        at
com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:403)
        at
weblogic.servlet.internal.EventsManager$FireContextListenerAction.run(EventsManager.java:376)
        at
weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at
weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
        at
weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(EventsManager.java:82)
        at
weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1609)
        at
weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:2764)
        at
weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:889)
        at
weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:333)
        at
weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
        at
weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
        at
weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
        at
weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200)
        at
weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:117)
        at
weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:204)
        at
weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
        at
weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
        at
weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:26)
        at
weblogic.application.internal.BaseDeployment$2.next(BaseDeployment.java:635)
        at
weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
        at
weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:212)
        at
weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:154)
        at
weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:80)
        at
weblogic.deploy.internal.targetserver.operations.AbstractOperation.activate(AbstractOperation.java:566)
        at
weblogic.deploy.internal.targetserver.operations.ActivateOperation.activateDeployment(ActivateOperation.java:136)
        at
weblogic.deploy.internal.targetserver.operations.ActivateOperation.doCommit(ActivateOperation.java:104)
        at
weblogic.deploy.internal.targetserver.operations.StartOperation.doCommit(StartOperation.java:131)
        at
weblogic.deploy.internal.targetserver.operations.AbstractOperation.commit(AbstractOperation.java:320)
        at
weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentCommit(DeploymentManager.java:815)
        at
weblogic.deploy.internal.targetserver.DeploymentManager.activateDeploymentList(DeploymentManager.java:1222)
        at
weblogic.deploy.internal.targetserver.DeploymentManager.handleCommit(DeploymentManager.java:433)
        at
weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.commit(DeploymentServiceDispatcher.java:161)
        at
weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doCommitCallback(DeploymentReceiverCallbackDeliverer.java:181)
        at
weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$100(DeploymentReceiverCallbackDeliverer.java:12)
        at
weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$2.run(DeploymentReceiverCallbackDeliverer.java:67)
        at
weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)
<Apr 15, 2008 3:21:44 PM EDT> <Warning> <netuix> <BEA-423420> <Redirect is executed in begin or refresh action. Redirect url is /console/console.portal?_nfpb=true&_pageLabel=AppDeploymentsControlPage.>
Apr 15, 2008 3:22:19 PM com.sun.faces.lifecycle.ELResolverInitPhaseListener
populateFacesELResolverForJsp
INFO: JSF1027: [null] The ELResolvers for JSF were not registered with the JSP container.
Apr 15, 2008 3:22:25 PM com.sun.facelets.compiler.TagLibraryConfig
loadImplicit
INFO: Added Library from: 
zip:/home/level8/apps/myapp/WEB-INF/lib/richfaces-ui-3.1.3.GA.jar!/META-INF/rich.taglib.xml
Apr 15, 2008 3:22:25 PM com.sun.facelets.compiler.TagLibraryConfig
loadImplicit
INFO: Added Library from: 
zip:/home/level8/apps/myapp/WEB-INF/lib/jsf-facelets.jar!/META-INF/jstl-core.taglib.xml
Apr 15, 2008 3:22:25 PM com.sun.facelets.compiler.TagLibraryConfig
loadImplicit
INFO: Added Library from: 
zip:/home/level8/apps/myapp/WEB-INF/lib/jsf-facelets.jar!/META-INF/jsf-core.taglib.xml
Apr 15, 2008 3:22:25 PM com.sun.facelets.compiler.TagLibraryConfig
loadImplicit
INFO: Added Library from: 
zip:/home/level8/apps/myapp/WEB-INF/lib/jboss-seam-ui.jar!/META-INF/s.taglib.xml
Apr 15, 2008 3:22:25 PM com.sun.facelets.compiler.TagLibraryConfig
loadImplicit
INFO: Added Library from: 
zip:/home/level8/apps/myapp/WEB-INF/lib/jsf-facelets.jar!/META-INF/jsf-ui.taglib.xml
Apr 15, 2008 3:22:26 PM com.sun.facelets.compiler.TagLibraryConfig
loadImplicit
INFO: Added Library from: 
zip:/home/level8/apps/myapp/WEB-INF/lib/jsf-facelets.jar!/META-INF/jstl-fn.taglib.xml
Apr 15, 2008 3:22:26 PM com.sun.facelets.compiler.TagLibraryConfig
loadImplicit
INFO: Added Library from: 
zip:/home/level8/apps/myapp/WEB-INF/lib/richfaces-ui-3.1.3.GA.jar!/META-INF/a4j.taglib.xml
Apr 15, 2008 3:22:26 PM com.sun.facelets.compiler.TagLibraryConfig
loadImplicit
INFO: Added Library from: 
zip:/home/level8/apps/myapp/WEB-INF/lib/richfaces-ui-3.1.3.GA.jar!/META-INF/ajax4jsf.taglib.xml
Apr 15, 2008 3:22:26 PM com.sun.facelets.compiler.TagLibraryConfig
loadImplicit
INFO: Added Library from: 
zip:/home/level8/apps/myapp/WEB-INF/lib/jsf-facelets.jar!/META-INF/jsf-html.taglib.xml
Apr 15, 2008 3:22:26 PM com.sun.facelets.compiler.TagLibraryConfig
loadImplicit
INFO: Added Library from: 
zip:/home/level8/apps/myapp/WEB-INF/lib/richfaces-ui-3.1.3.GA.jar!/META-INF/richfaces.taglib.xml

This is a class found in el-ri, but that file isn't included in the Seam distribution and is of course not included in the WL samples.  Clearly, this is a symptom of something else. 

Is there anything to consider beyond different WL configurations?

Any insight into why this is happening is much appreciated.

Thanks.