Keep your system up to date with the most recent cumulative update package for SQL Server 2008 SP2. This package contains all of the SQL Server 2008 hotfixes that have been released since the initial release of SQL Server 2008 SP2.
CU#3 KB Article: http://support.microsoft.com/kb/2498535
Understanding Incremental Servicing Model for SQL Server
- SQL Server Support Information: http://support.microsoft.com/ph/2855
CU#2 KB Article: http://support.microsoft.com/kb/2467239
CU#1 KB Article: http://support.microsoft.com/kb/2289254
SQL Server Sustained Engineering