Ha!
from the Microsoft Website (my bolding, Microsofts words):
Windows XP Service Pack 3 Overview
Brief Description
Windows® XP Service Pack 3 (SP3) includes all previously released updates for the operating system. This update also includes a small number of new functionalities, which do not significantly change customers’ experience with the operating system. This white paper summarizes what is new in Windows XP SP3.
Feckers!