I didn't have any of the problems listed above, not corrupt, rebooted just fine (on the charger). I can confirm that it removes the dual boot menu. I haven't reinstalled the dual boot yet till I hear it's safe. [edit from below the old boot menu flasher doesn't work, but has been updated.]

It may be unrelated but I had been unable to install the unrar and unzip updates, but they installed fine after system update.