Are they simply blank? IF so, disable the email scanning feature in your anti-virus software. (For example, in AVG, uncheck certify under the email scanning settings.) You'll still be protected by its other features and by Outlook's own security.
--
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers