I just ran the update to .247 myself. (deleted the vender.xml and ran loader.exe) and everything seem to go smoothly. I havent noticed anything bad yet.
One thing I have noticed, in desktop manager in the app loader, it now ONLY lists the applications that have been added to the phone. Where before (.167) I could uncheck brickbreaker, word mole (stuff from the "factory") they are not listed, but are installed. Is this normal???
EDIT Device Manager 4.7. I did not change the Device Manager version.