I can successfully POST any Unicode character (especially non ISO-8859-1 chars) with my JSF-forms without having to deal with encodings. But I have one Seam component that takes parameters via @RequestParameter and GET. In this case I have to manually convert the input String like this: in = new String(in.getBytes("8859_1"), "UTF-8"); If the input parameter was POSTed I don't need to do that. Why does Tomcat/JBoss/Seam convert the Unicode to ISO-8859-1 if the input was sent via GET? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4081773#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...