Change in configuring AtmosphereServlet init-params

Hi,

In the most recent version of atmosphere-example the init-params were
changed in servlet configuration (in web.xml).

From:
<init-param>
<param-name>org.atmosphere.cpr.broadcastFilterClasses</param-name>
<param-value>org.apache.wicket.atmosphere.TrackMessageSizeFilter</param-value>
</init-param>

To:
<init-param>
<param-name>org.atmosphere.cpr.AtmosphereInterceptor</param-name>
<param-value>org.atmosphere.client.TrackMessageSizeInterceptor</param-value>
</init-param>
<init-param>
<param-name>org.atmosphere.client.TrackMessageSizeInterceptor.delimiter</param-name>
<param-value><![CDATA[<|msg|>]]></param-value>
</init-param>

What is the reason of this change, what these parameters are used for?
Actual version does not work for me and I need to know how to debug
this. Any tip will be helpful.