Migrating application to JBoss EAP 5 fails to deploy with 'Element type "res-type" must be declared'

Issue

• We are migrating to JBoss EAP 5.x, wour application is failing to deploy with this error:

ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] (main) Error installing to Parse: name=vfszip:/opt/jboss-eap-5.1/jboss-as/server/default/deploy/My.ear/ state=PreParse mode=Manual requiredState=Parse
org.jboss.deployers.spi.DeploymentException: Error creating managed object for vfszip:/opt/jboss-eap-5.1/jboss-as/server/default/deploy/My.ear/My.war/
  at org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49)
...
Caused by: org.jboss.xb.binding.JBossXBException: Failed to parse source: Element type "res-type" must be declared. @ vfszip:/opt/jboss-eap-5.1/jboss-as/server/default/deploy/My.ear/My.war/WEB-INF/jboss-web.xml[15,13]
  at org.jboss.xb.binding.parser.sax.SaxJBossXBParser.parse(SaxJBossXBParser.java:203)
  at org.jboss.xb.binding.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:168)
  at org.jboss.xb.util.JBossXBHelper.parse(JBossXBHelper.java:189)
  at org.jboss.xb.util.JBossXBHelper.parse(JBossXBHelper.java:166)
  at org.jboss.deployers.vfs.spi.deployer.SchemaResolverDeployer.parse(SchemaResolverDeployer.java:137)
...
Caused by: org.xml.sax.SAXException: Element type "res-type" must be declared. @ vfszip:/opt/jboss-eap-5.1/jboss-as/server/default/deploy/My.ear/My.war/WEB-INF/jboss-web.xml[15,13]
  at org.jboss.xb.binding.parser.sax.SaxJBossXBParser$MetaDataErrorHandler.error(SaxJBossXBParser.java:426)
  at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
  at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
...