I recently reinstalled XP Pro and had a couple BSOD before the install would complete. So I tried installing it a third time when finally the install completed without a hitch. But after installing SP2 (via Windows Update website), I noticed that the Windows splash screen was missing the word "Professional" and the copyright year. I've been using the new install for a few days now with no problems, though. Previous installs (without SP2) didn't have that minor issue. Hmmmm.
I read on CNET that SP2 is pretty much a major overhaul of XP and may cause problems with some programs not working correctly (or at all). Let's see if the next version of Windows is better - not!