I'll put this in the newbie as I have a feeling it's a newbie question ;-)
I'm aware that backups of new releases will not now work with the iXtreme 1.5 firmware.
However, my 360 is flashed with iXtreme 1.41. Will I still need to get the firmware updated with the forthcoming (hopefully!) iXtreme 1.6? Or will I have to use originals for new games?