I have i model B with nothing plugged in except a powered USB HDD which has the OS on it.
After the latest update, my pi won't shutdown.
Both sudo halt and sudo poweroff result in a reboot, and the only way to poweroff is to pull the plug.
I've seen this mentioned for the B+, but I have good mains wiring, and a solid brick construction to prevent cosmic rays (long story with Sun).
This pi has both my mail and web servers on it, so I'd like to do a controlled shutdown.
Any help would be appreciated.
Thanks.
[EDIT] It's not even rebooting now as I can't ssh back in. The act light does the poweroff flashing, but all the rest of the lights stay on.