The detail is: "No cron runs have been recorded."
Just updated from 4.6.10. This has never been a problem with other updates. What do I have to do to fix this? We need cron to send mailings as I recall.
Edit: There are a lot of errors including "cron not running" on the civicrm wordpress demo site so it's not just me. I think something needs a tidy. Another error on the demo site: "Failed to make directory (extensionsDir) at "/srv/buildkit/build/wpmaster/wp-content/uploads/civicrm/ext/". Please update the settings or file permissions."