I have tried 3 times now to install this update, twice with the phone still rooted and once after unrooting and rebooting. Each time, I see the little Android guy next to an open box with a progress bar, which goes to about 1/3, then I get the triangle with ! inside next to the little Android guy. That isn't supposed to happen, right?
Judging by more recent posts about this update, it's just as well I can't install it.
T-Mobile Samsung Galaxy SII SGS-T989 (rooted stock), Archos 80 G9 8GB (surdu_petru's rooted 4.0.26)