Since Service Pack 2 was relelased, numerous bugs have been fixed. They are available in cumulative update packages (6 to date). However, Microsoft recommends customers not to install these cumulative updates unless affected by one of the fixed bugs. That creates a dilemma for SQL Server administrators. You do not want to install a package if Microsoft recommends against it, but you also want to take pro-active action so that you can squash the bug BEFORE it affects you.