This site has been updated to WordPress 3.7.1, XenForo 1.2.3, and Resource Manager 1.1.0. This prompted my interest in the XenScripts plugin and errors being placed in the server log.
Remote publishing has been blocked on this site. The XenScripts plugin includes a get_currentuserinfo() function which returned false. Some of this code has been modified a few minutes ago to test new code.
After changing the code, the WordPress iPad application is now able to log into the network using a WordPress user.
This post is created using the browser and should be placed in the proper forum. Next, I will try to create a post using the iPad application.