Micke and Shelby, try changing the 30 min. entry in /etc/cron.d/ravupdate. In the first field, change the */30 to something like 7,37. This will still update every 30 minutes, but at *:07 and *:37. I think the servers are getting overloaded at *:00 and *:30. You'll need to restart crond with "service crond restart" for these changes to take effect.