Exception during commit (defaultfiredocs as template pub)

Hi All

I've created a publication using "defaultfiredocs" publication as a 
template. While publishing the first page of publication i.e. homepage, 
I get following exception:

    * Exception during commit or rollback: null (see logfiles for details)


log4j.log gives:


java.lang.NullPointerException
    at 
org.apache.lenya.cms.site.tree2.SiteTreeRevisionVerifier.eventFired(SiteTreeRevisionVerifier.java:33)
    at 
org.apache.lenya.cms.observation.ObservationManager.notify(ObservationManager.java:88)
    at 
org.apache.lenya.cms.observation.ObservationManager.eventFired(ObservationManager.java:101)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:585)
...............................................................
...............................................................
...............................................................


I'm using:

Lenya 2.0.3/ tomcat5.5.17

Please suggest.

-- 
Anish Sneh
Software Engineer
Techblue Softwares Pvt. Ltd.
www.technologyblueprint.co.uk