Has anyone else noticed this bug? I have guest accounts turned off on my MBP's, but after this new patch, it's back on . . . and although it says "disabled" in the system preferences, it is still available upon login. I've tried toggling the switch and that seems wrong. Check mark to enable it, but then it's listed as "disabled" and vice-versa. Anyone else have this problem, anyone have a work around? Would like to turn off Guest Accounts again.