couple of XP SP3 Issues i've come accross
1) the new UXTheme patcher doesn't rest the security permissions correctly on uxtheme.dll in the system32 dir. once patched reboot and then login as an admin and add to the security tab users and power users with read and execute rights. Symptom was an Explorer.exe crash on login.
2) the Printer spooler service crashes when you add a printer (on logon via my VBS script) found an issue with the Driver PCL5 and PCL6 for the HP 4000 and HP 4050 Laserjets.. so far only resolution use the Apr 08 Universal Printer Driver Iím using the PCL5 one.