Our RSS feed for comments seems to be suffering from a glitch. The comments are coming through via Google Reader but not for other aggregators, eg, Mozilla Thunderbird, or those built into web browsers.
I’m working on it here as I get time. Apologies. (RSS for blog posts is working fine.)
If you’re curious about RSS, see this video, RSS in Plain English:
I found a few rogue characters and deleted them. That seems to have fixed the problem. Let me know if you’re still experiencing problems.