i just updated from 3.52 M33 to 3.71 M33-2. i also installed the 1.50 kernel add-on v2.
one thing i had on 3.52 was the PRX that switched the function of the network update icon with a power off/reboot function, and i used it pretty much all the time. i searched around and found the Reboot-Shutdown PRX for CFW 3.71 M33 but the readme says to put "update_plugin.prx" in "vsh/module" in flash0. but the closest thing i have is a "podule" folder in vsh, and that doesn't have any files that even resemble "update_plugin."
i'm pretty sure i haven't done anything wrong while installing anything, but my PSP is now a bit glitchy. for instance, if i try to use flash0 as the USB device, my PSP freezes for about 10 seconds, then shuts off.
-= Double Post =-
i said it's a bit glitchy. scratch that, because it turns out it's actually barely even a PSP anymore.
it won't play UMDs.