basically for those who want to play backups of Fable 3 DO NOT want to update to the newest dashboard that came out Nov 1st 2010.
if your on the older v9199 dashboard you can play a backup copy of Fable 3 without your system getting flagged etc.
if your running the newest dashboard your pretty much screwed until the higher ups figure out a work around which will probably be new firmware for the 360's although i got a Samsung drive myself and supposedly from what c4eva (the guy who makes the modified firmware) said, Samsung drives don't do AP2.5 checks.
but basically from what i been reading your ORIGINAL game disc of Fable3 will still work with newest dashboard (the one that came out Nov 1st 2010) on LT firmware. but backup copies will not.
p.s. http://www.xbox-scene.com/xbox1data/sep/EkllZVZVAErSkVQMjY.php , http://www.xbox-scene.com/xbox1data/sep/EklluupVlEhEXtWjIS.php ... just some info about AP2.5, SSv3 etc.
me personally i am going to stay on v9199 dashboard for as long as i can. at least until all this AP2.5 BS is sorted out fully.