> > There was a document somewhere, but I can't remember offhand exactly
> > where which explains some of the aspects of how the system works. In
> > particular it points out that it can take some time between the data
> > being updated and the index being updated. So for your example if the
> > index records the last access order as B, A, C but A has just hit the
> > system you could get the sort of result you describe where a recent
> > access occurs somewhere further down the list.
>
> That should never be the case. If the index wasn't fully updated, it
> should serve you an old version of both the index and the data. If
> something else happens, it is definitely a bug, so you should file a
> ticket giving as much information as you can.

Dave, this behaviour is documented here (see the section called "The
commit() process"):
http://code.google.com/appengine/articles/transaction_isolation.html

It looks like a fundamental limitation of the datastore, I doubt it's
ever going to be fixed.
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