Windows SP3 Installation issues

SP3 is finally out, but some folks are reporting that after installing it on some computers, the system goes into continuous reboot mode. This happens because something in SP3 (on some hardware configurations) causes the computer to crash during the boot process and the OS is set to automatically reboot after a crash. Here is a link to a nice blog that contains an excellent discussion of what the problem(s) might be and what to do about it:
http://msinfluentials.com/blogs/jesper/archive/2008/05/08/does-your-amd-based-computer-boot-after-installing-xp-sp3.aspx