Just flashed cm-10-20120804-EXPERIMENTAL-p3 and gapps-jb-20120729 on top of cm-10-20120728-EXPERIMENTAL-p3 ( cache wipe only ) using CMW 188.8.131.52.
No problems so far, shutdown is now working, and everything else is still working as in previous version.
The only bugs I've encountered ( same as previous version ) are the CM10 notification apps selection not working, and the front camera.
EDIT: also I can't get it to be detected as usb ( mtp or mass storage ) when I plug in to the computer ( doesn't even show up on lsusb ). This worked with 3.2 TB rom so I'm not assuming a hardware problem
EDIT: disregard the usb mounting issue, I should have RTFMed, it's under Storage > Settings ( top right of screen )