please check that you have <h:head> and <h:body> in your xhtml page or in template.
I got this problem because I use the jquery.js from the richfaces compressed file. If you have <h:outputScript name="jquery.js"/> it
will trigger the loading of packed.js, and I found that I needed to have <h:outputScript library="javax.faces" name="jsf.js"/> before
that. And that fixed it for me.
The issue mentioned by Brendan is tracked here:
Some useful information and workaround for RF 4.1 can be found here:
Roman Karnes wrote:
Btw you don't need to use parsers anymore, these options were removed in RF 4.0.