I use a fairly complex password thats generated through a password manager. I am unable to send updates to my blog (wordpress) with this password. I verified that I could log in with the password.
I have changed the password already, so no worries... Here is the password that would not allow me to post:
After I changed the password to something simpler, the post went through straight away. The password was used to pull the contents of the blog without issue, and it seemed to only affect posting, returning only an "invalid password" error (which I verified was not the case.)