There is an excellent list of KB articles and hotfixes for SCCM 2007 Post SP2: http://social.technet.microsoft.com/wiki/contents/articles/4505.list-of-public-kb-articles-and-hotfixes-for-configuration-manager-2007-sp2-en-us.aspx
I believe it’s worth to review this list from time to time…
Regards,
Michael