Keep your system up to date with the most recent cumulative update package for SQL Server 2008 SP1. This package contains all of the SQL Server 2008 hotfixes that have been released since the initial release of SQL Server 2008 SP1.
Previous CU KB Articles:
Abhishek SinhaProgram ManagerSQL Server Sustained Engineering
This information should be published also on Update Center for Microsoft SQL Server here: technet.microsoft.com/.../ff803383.aspx
According to the information in the Update Center for Microsoft SQL Server the latest CU for SQL 2008 SP1 is not CU #9 but CU #8