The seam JPA example throws the exception below when it is accessed. In the browser a JSF debug page is shown. I will attach the log and the source code for the debug page for details.

2008-04-10 11:36:36,585 ERROR [STDERR] Apr 10, 2008 11:36:36 AM com.sun.facelets.FaceletViewHandler handleRenderException
SEVERE: Error Rendering View[/home.xhtml]
com.sun.facelets.FaceletException: Could not instantiate feature[compiler.ExpressionFactory]: org.jboss.seam.jsf.SeamExpressionFactory
at com.sun.facelets.compiler.Compiler.featureInstance(Compiler.java:154)
at com.sun.facelets.compiler.Compiler.createExpressionFactory(Compiler.java:128)
at com.sun.facelets.impl.DefaultFaceletFactory.createFacelet(DefaultFaceletFactory.java:198)
at com.sun.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:144)
at com.sun.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:95)
at com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:502)