Bad response on Firefox with enabling Gzip

While functional testing with enabling gzip(We are using Apache/2.0.49) bring me a bad news, there is randomly returns bad response instead of 200 or 304 response code with Firefox/3.6.3:



Apache access.log has indicated the .css file return 304 Not modified, however, FF seems neither receive 304 response code successfully nor retrieve it from local cache. So the page looks wired.

Another issue is that the page will display the irrecognizable characters in its response, something like this:

���������HTTP/1.1 200 OK Date: Tue, 25 May 2010 07:30:02 GMT Server: Apache/2.0.49 (Win32) DAV/2 mod_ssl/2.0.55 OpenSSL/0.9.8e mod_jk/1.2.15 X-Powered-By: Servlet 2.4; JBoss-4.0.4.GA (build: CVSTag=JBoss_4_0_4_GA date=200605151000)/Tomcat-5.5 Vary: Accept-Encoding Content-Encoding: gzip Keep-Alive: timeout=15, max=88 Connection: Keep-Alive Transfer-Encoding: chunked Content-Type: text/html;charset=UTF-8 a ¬� ������2d3 �VQo...

Meanwhile, IE seems works fine. Does it mean its a Firefox issue? Or it is a Apache 2.0.* gzip issue? (As i did not see such issues reported by Apache 2.2 version)

After taking simple search, there are other people met the same problem as well:
http://forums.mozillazine.org/viewtopic.php?f=38&t=1121915&p=9413795#p9413795

I tried Apache2.2.10, but it seems preventing 304 Not modified response, which is a bug of apache:
https://issues.apache.org/bugzilla/show_bug.cgi?id=45023

Anyone met the similar issues? Any better solutions?