Microsoft released an updated SQL Server 2005 SP2 on March 5th, 2007. The build number is 9.00.3042.01. The previous build number was 9.00.3042.00.Microsoft released a SP2a patch for the second service pack for SQL Server 2005 to fix the issues with the maintenance plans.If you have upgraded to SP2, use the download from here to patch the system. KB 933508 has more information on this patch.
Reference : Pinal Dave (http://blog.SQLAuthority.com)