In Seam CVS and 1.3 when it is released, Seam installs the ajax4jsf filter as part of it's master filter, and installs it before Seam's built in filters. So, for Seam + a4j, the first filter in the list should be:
<filter>
<filter-name>Seam Filter</filter-name>
<filter-class>org.jboss.seam.web.SeamFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>Seam Filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
Don't worry, if you leave the a4j filter in web.xml it doesn't break anything!
