anonymous wrote : 09:17:24,647 INFO [TomcatDeployer] deploy, ctxPath=/faces-tutorial, warUrl=.../tmp/deploy/tmp56600f | aces-tutorial-exp.war/ | 09:17:25,881 WARN [Digester] [ConverterRule]{faces-config/converter} Merge(null,java.math.BigDecimal) | 09:17:25,881 WARN [Digester] [ConverterRule]{faces-config/converter} Merge(null,java.math.BigInteger) | 09:17:26,053 INFO [STDOUT] java.lang.ClassCastException: org.apache.myfaces.renderkit.html.ext.HtmlButtonRenderer | | The HtmlButtonRenderer class is part of the library tomahawk.jar. I had the same problem last week and i found out that i had to put this library in WEB-INF/lib of my jsf-portlet application. It looks like there is a problem with jboss portal, which needs this library for rendering the jsf-portlets on the portal page. I don't really know why. I hope i could help you ! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4002673#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...