Character encoding bug?

[Hailong Zhang]

I'm using myfaces-core-1.1.3 & tomahawk-1.1.2 & tomahawk-sandbox-1.1.4-SNAPSHOT, my application server is Tomcat 5.5.12 and my OS is Windows XP sp2.
For example, I request http://localhost:8080/test/rss.xml, the xml will be displayed but the Chinese characters can not be displayed correctly.
But if I use myfaces-all-1.1.1, everything works properly.
Maybe this is caused by ExtensionsFilter, I'm not sure.

Is this a bug?

BTW:What's the difference between org.apache.myfaces.component.html.util.ExtensionsFilter and org.apache.myfaces.webapp.filter.ExtensionsFilter?

Thank you!