web.xml's JSP interception

This fragment exists in web.xml :

     <servlet-mapping>
         <servlet-name>webdav</servlet-name>
         <url-pattern>*.jsp</url-pattern>
     </servlet-mapping>

Slide works if its taken out - with that slide-bundled version of  
tomcat.

If present it stops Slide working with Sitemesh.

Is the fragment needed anymore ?

- Paul