I did this:
# freebsd-update fetch # freebsd-update install # reboot
# freebsd-update upgrade -r 9.1 # freebsd-update install # reboot
# freebsd-update install # reboot
remotely without any problems.
# freebsd-update fetch # freebsd-update install # reboot
# freebsd-update upgrade -r 9.1 # freebsd-update install # reboot
# freebsd-update install # reboot
remotely without any problems.