The WordPress update is complete. No incidents so far.
Identified WPGPlus, the WordPress Google+ integration plugin, as the source of “A valid URL was not provided” errors when we publish. Disabled it because it never worked once in the first place. Hopefully this will solve the Twitter integration problem too, we’ll find out with this post.
Anonymous read access to the tracker is already fixed.
Sorry for (Enjoy the) extra app notes posts if you’re a hater (lover).