The last time I was able to post from my phone, which is where I post from 99% of the time, was October 19.
iPhone 6s, OS 9.0 (at this moment, I am upgrading to 9.1, and it will be interesting to see if that fixes it)
I have restarted my phone--did not help. I have cleared all of my safari pages, and that did not help.
--I type a post in Reply or Quick Reply, and when I hit Post, I get the pink box that says my post is timed out. Trying again from there is unsuccessful.
--I am unable to log out.
--I am unable to switch users.
Logging out and trying to switch users gets me this message: