strange error???

[malcolm cooke <ma...@firstlightassociates.co.uk>]

Hi everyone,
I'm getting an odd error and I hope someone can cast some light on it for 
me. I have logged out of turbine (Using tdk 2.1 b.t.w)
and just leave the browser alone. This error then pops up which I guess 
must be being triggered by a timeout. What I don't really understand is why 
it is trying to do a user update to the DB. Nything to do with my extension 
to Turbine_user table?
Thanks

Malcolm

Closing XML-RPC server socket.
java.lang.NullPointerException
         at org.apache.turbine.om.peer.BasePeer.doUpdate(BasePeer.java:1635)
         at org.apache.turbine.om.peer.BasePeer.doUpdate(BasePeer.java:1578)
         at 
org.apache.turbine.om.security.peer.TurbineUserPeer.doUpdate(TurbineU
serPeer.java:463)
         at 
org.apache.turbine.services.security.db.DBUserManager.store(DBUserMan
ager.java:272)
rethrown as org.apache.turbine.util.security.DataBackendException: Failed 
to sav
e user object
         at 
org.apache.turbine.services.security.db.DBUserManager.store(DBUserMan
ager.java:276)
         at 
org.apache.turbine.services.security.BaseSecurityService.saveUser(Bas
eSecurityService.java:379)
         at 
org.apache.turbine.services.security.TurbineSecurity.saveUser(Turbine
Security.java:261)
         at 
org.apache.turbine.om.security.TurbineUser.valueUnbound(TurbineUser.j
ava:649)
         at 
org.apache.catalina.session.StandardSession.removeAttribute(StandardS
ession.java:953)
         at 
org.apache.catalina.session.StandardSession.expire(StandardSession.ja
va:551)
         at 
org.apache.catalina.session.StandardManager.unload(StandardManager.ja
va:541)
         at 
org.apache.catalina.session.StandardManager.stop(StandardManager.java
:648)
         at 
org.apache.catalina.core.StandardContext.reload(StandardContext.java:
2312)
         at 
org.apache.catalina.loader.ContextNotifier.run(StandardLoader.java:13
46)
         at java.lang.Thread.run(Thread.java:536)