Forum Moderators: open
It is possible that an RDF did finish, but has errors; or the RDF was in process but had to be interrupted for some reason. The ODP search server sometimes sees the RDF ending and updates the search database date even though no new results were actually added to the search. It is probably a glitch. Look again in a couple of weeks after the next big phase of ODP upgrades is over.
See also: [webmasterworld.com ]