Re: BBPress works in Firefox but not in Internet Explorer
You can use browser add-ons for Firefox like Firebug or the Web Developer Toolbar, or you can use a command line tool, or there are places online that you can submit your URL to and they will show the headers returned.
Using the Web Developer Toolbar for Firefox, I get this:
Response Headers - http://fakeplasticfish.com/discuss/
Date: Sun, 01 Nov 2009 21:27:42 GMT
Server: Apache
Keep-Alive: timeout=15, max=99
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: text/html; charset=UTF-8
200 OK
Which is correct, and different from before, and it looks like you fixed it.