I did a fresh install of Arch on my SD card, put it into my Pi, and it was working great with SSH. I updated it, rebooted, and now I can't ssh into it. On the client-end, I get:
$this->bbcode_second_pass_code('', 'debug1: Authentications that can continue: publickey,password
Permission denied, please try again.')
Edit: Apparently this was caused by the recent openssh package update. My solution was to just create a new user account (requires local access to the Pi), and then ssh into that instead of root. From there, su works to get into root.
$this->bbcode_second_pass_code('', 'useradd -m -G wheel -s /bin/bash espionage724
passwd espionage724')