OS X Lion Prompting Network Users to Enter Admin Credentials During Normal Use

Hi,

We are experiencing a frustrating issue where all of our open directory network users that we've upgraded to Lion are being prompted to enter the local administrator credentials on their laptops periodically throughout the day while they work. They are being prompted with the general OS system prompt you would see when installing software but they are not installing software they're just using the computers normally. They do not have administrative credentials on their laptops. Some users get the prompt once an hour and some only see it once or twice a week. They are all on different model Apple laptops. They spend most of their day logged into Gmail in Safari with Google Chat open. The third party apps that they are using are Office, Google Notifier, Box Sync, Google Chrome, Firefox. All the computers are in a managed computer group in Workgroup manager.

We've examined the log files for hints as to what is causing the issue but nothing stands out.

We'd greatly appreciate any suggestions.

Thanks

Tim