SQL Server 2005 - Service Pack 2a (SP2a) Update
Downloaded and installed Service Pack 2 for SQL Server 2005? Well here's a reason to download and apply it again.
A few days after releasing Service Pack 2 for SQL Server 2005, Microsoft has re-released it with an additional fix for maintenance plans. If you have already applied SP2, you will need to apply this critical patch. If you are not sure if the updated service pack 2a has been applied to a server, this kb article explains how to check the affected files.
While you are at it, don't forget that Updated SQL Server 2005 Books Online (help) Available Now (Feb 2007).