SQL Server is under a heavy load when you perform a profile import in Office SharePoint Server 2007
http://support.microsoft.com/default.aspx?scid=kb;en-us;2200878&sd=rss&spid=11373
Windows SharePoint Services 3.0 - SharePoint workflow instances that contain an OnTaskCreated activity do not rehydrate or fail with an EventDeliveryFailedException
http://support.microsoft.com/default.aspx?scid=kb;en-us;2288782&sd=rss&spid=12200
SharePoint - User prompted for credentials on first request after application pool restart on Windows Server 2008 when using NTLM
http://support.microsoft.com/default.aspx?scid=kb;en-us;2288443&sd=rss&spid=12200