I installed SP3 on my wife's computer tonight. The installation went flawless. I decided to celebrate by going on the Net. Lo and behold, my wireless home network, at least as far as the computer was concerned, did not exist anymore. I tried several times to reestablish the connection, but no go. I even sacrificed a goat and a turtledove, but it still didn't work. Only until I uninstalled the *&^%$ thing did the network (without any coaxing from me) come back on in all its glory.
I would like to take this opportunity to thank Microsoft for their in-depth programming to improve XP. If they were in the car business, we would all be paddling them with our feet just like Fred Flintstone.