incorrect page rendering with firefox

[baz]

Hello,
we do have some wired rendering problems using firefox.
Firefox does not render our pages in a correct way when the pages have .xhtml extensions.
See this JIRA http://jira.jboss.com/jira/browse/RF-2846 issue(created for uploading the screenshots)
What we have done:
1. starting our app.
2. Using Firefox to save the shown page.(This page has a xhtml extension)
3. Starting Firefox with the saved page (while the server is still running) see screenXHTML (in Jira)
4. rename the page to an html extension
5. start firfox with this page see screenxhtml (in Jira)

I have not found any solution for this problem for approx 5 month. Now it gets more annoying. Perhaps someone who reads this forum cangive us advice or a pointer.
Ciao,
Carsten

[baz]

I forgot to mention:
My old app with richfaces 3.1.0RC5 does not have this problem. This app runs on tomcat5.5 with myfaces as jsf implemantation
My new, migrated app with richfaces 3.1.4GA runs on tomcat 6 (and jsfRI) shows this issue.

[baz]

Update:
it seems to be a problem with the jsf RI implementation. I get the same problem with mojarra-1.2_08-b06-FCS

But with myfaces-core-1.2.2 it renders correctly.

But i am bound to RI. What shall i do?