Several people <http://bit.ly/xSj2ef> have detected a strange behaviour in 
Google App Engine JDO, where your app unpredictably returns stale data.

I've written a small servlet to demonstrate this.

The code is included in this note, and the app uses the plain vanilla 
jdoconfig.xml also included here.

You can see it live deployed in appengine here <http://bastide07.appspot.com/staledata>

When using this app, you will notice that occasionally the records that 
have just been added or deleted do not show up until a couple of refreshes.

Things that have been tried but do not appear to work : 

   - Wrapping transactions around adds and deletes
   - Using cache control headers in response
   - setting <property 
   name="datanucleus.appengine.datastoreReadConsistency" value="STRONG" /> in 
   jdoconfig.xml


I suspect a threading issue that can be solved by configuration options... 

I must be doing something terribly wrong, but I do not see what...
Any help appreciated