Virtually everyone knows that after a software product is released, the vendor periodically updates the code to fix problems that have been discovered. But many people don't realize that the same is true of product documentation. For example, Microsoft recently released an update to SQL Server 2005 Books Online (BOL) that contains all the latest corrections. You can check out the updated SQL Server 2005 BOL at technet.microsoft.com/en-us/library/ms166018.asp