I am using JBoss 4.0.5, Ajax4jsf 1.1.1 with myfaces 1.5 and tomahawk 1.7.
Add <a4j:support> to <t:selectOneMenu>, the following is the response(I removed those matched XML elements).
<?xml version="1.0"?>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml"><body><span id="ajax-update-ids"><input type="hidden" name="jsf_sequence" value="3" /><input type="hidden" name="javax.faces.ViewState" id="javax.faces.ViewState" value="rO0ABXVyABNbTGphdmEubGFuZy5PYmplY3Q7kM5YnxBzKWwCAAB4cAAAAAN0AAEzcHQACS9zZGFkLmpzcA==" /></span><meta id="Ajax-Response" name="Ajax-Response" content="true" /><!-- MYFACES JAVASCRIPT -->
<script type="text/javascript">//<![CDATA[ function getScrolling()
{
var x = 0; var y = 0;if (self.pageXOffset || self.pageYOffset)
{ x = self.pageXOffset;
y = self.pageYOffset; }
else if ((document.documentElement && document.documentElement.scrollLeft)||(document.documentElement && document.documentElement.scrollTop))
{
x = document.documentElement.scrollLeft;
y = document.documentElement.scrollTop; }
else if (document.body) {
x = document.body.scrollLeft;
y = document.body.scrollTop; }
return x + "," + y; } ////]]>
</script></body></html>
error[13:31:08,982]: Error parsing XML
error[13:31:08,982]: Parse Error: Document is empty