My apologies for recent craziness with the RSS feed. It seems that one of my plugins has interfered with the operation of another plugin. I’m trying to straighten it out right now.
Incidentally, this is an issue that comes up sometimes. WordPress plugins are written by a host of third-party developers who have no way of knowing what some other developer is doing with his or her own plugin. While most plugins are pretty solid, once in a while you’ll get one that either doesn’t function well with your particular version of WordPress, is incompatible with another plugin, or even runs oddly because of the way your host has their systems set up.