I think the real problem is the hundreds of titles suffering incompatibility issues with SP2. Ironically, it even includes some of M$'s own products.
http://support.microsoft.com/defaul...ct=windowsxpsp2
Programs that are known to experience a loss of functionality when they run on a Windows XP Service Pack 2-based computer
The list seems shorter than yesterday. C&C: Generals, StarCraft, WCIII, Combat Flight Simulator 3, SimCity 4 were all among the list as of yesterday.