Cannot extract mailbox messages from the Exchange backup

Anyone know if this error has been fixed via a hotfix or still a registry amendment on the Exchange Server?

The job failed with the following error: Cannot extract mailbox messages from the Exchange backup. Review the job log for more information.

I've seen this and since we're rebooting the server this evening, could be an opportunity

http://www.symantec.com/business/support/index?page=content&id=TECH127758

Thanks