I have a webcomic at http://somuchpotential.net. People asked me to do an RSS feed for it, and so I signed up with Rsspect, which is a service put together by Ryan North of Dinosaur Comics fame. It's a cool service: you add some span tags to your html and it maintains an RSS feed which updates whenever you do.

Here's the problem: When somebody subscribes to the RSS feed using Mozilla Thunderbird, they get the most recent entry, but no historic ones. Also, they never receive any new entries either, despite the fact that the RSS XML file gets updated. You get the one entry, and that's all you ever get. I've tried writing to Ryan about it, but I guess I'm falling foul of his spam blocking software.

I'm no expert in the RSS XML format, so I'm asking for help, please. The feed is at http://rsspect.com/rss/somuchpotential.xml. Can anyone spot the problem with the feed which might be preventing Thunderbird from processing it properly?

Many thanks in advance.