SQL Server 2008 has been out for over two years and now a very significant Cumulative Update has been released. If you are using SQL Server 2008 then you must certainly install it to fix the various bugs.
Cumulative Update 3 for SP1: http://support.microsoft.com/kb/971491
Cumulative Update 6 for RTM: http://support.microsoft.com/kb/971490
I heavily recommend this update.
Feel free to talk to me if you want more information on it.
Reference : Pinal Dave (http://blog.sqlauthority.com)