It was mentioned before, but our Wordpress based Planet continues to be a PITA to maintain and add RSS sources to. In addition, it is a significant security issue, and someone tried to hack it this week after some serious Wordpress issue was not patched quickly enough (yes we do run the auto-updater).
So this is the final drop in the bucket so to say.
We restored everything from an 3 day old backup and updated everything immediately, so hopefully it will be ok for now, but our timeline to retire this Wordpress based planet got accelerated by a lot.
You can follow our issue tracker here on the progress with replacing it with an alternative.