I don't think PS3 has been adjusted down. As of the time of this posting, the last two weeks of Japanese PS3 sales are missing for Japan so I think that is being reflected in the total (i.e. the weeks ending Nov 1 and Nov 8 have zero sales).
CORRECTION: Having now looked closely at the numbers, VGC's Japan total of 1,120,261 for PS3 includes the Nov 8 sales of 42,420 but has sales of zero for the week ending Nov 1. That figure used to be 34,126 but I suspect that the reason it shows 0 now is that it might be in the process of being revised. (Or maybe it was just deleted by an errant keystroke). If it is an adjustment in progress, for what it's worth Famitsu had 37k that week and MC a little over 36k.