Just seen this new KB article; may be worth considering if you are using /PAE to support more than 4GB RAM. 

Data is corrupted when PAE is enabled on a Windows Server 2003-based computer http://support.microsoft.com/kb/834628 "[]...When you run Microsoft SQL Server on a Microsoft Windows Server 2003-based computer, data that is saved to the SQL Server database may be corrupted.  This problem may occur if you use the Intel Physical Addressing Extension (PAE) specification to support more than 4 gigabytes (GB) of installed memory in your computer".