"Some customers are finding that when they try to replicate their public folder content to Exchange 2010, it will not replicate." Fix contained within to clear error and allow public folders to replicate to Exchange 2010!
"There are several scenarios for consideration when deploying Exchange Server 2010 into an environment where Outlook 2003 is used. Most of these scenarios have been documented prior to the product release and some applied to previous versions. However, in a review of support cases, we have found that they have not been used prior to contacting Microsoft."