[support] Drupal7 should send notification about updates

Dear list, I have now some time a drupal 7.10 installation running. Some modules are outdated, but I got no notification from the system that there are updates available. Under /#overlay=admin/reports/updates/settings I filled my email address, selected daily check and send for all versions. Under reports I see that the cron process was execute 1 hour 17 minutes ago, so I think with the cron process is everything fine. Is this a bug in drupal7 or must I setup some more options? Thanks Matthias -- "Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the universe trying to produce bigger and better idiots. So far, the universe is winning." -- Rich Cook