This URL :
http://livedemo.exadel.com/richfaces-demo/richfaces/outputPanel.jsf?c=outputPanel&tab=usage
Demo code Line 51
<h:outputText id="out1" rendered="#{not empty rsBean.text1}" value="Approved Text: #{rsBean.text2}" />
thanks for you report!
https://jira.jboss.org/jira/browse/RF-7712 created.