I've noticed two problems with the RSS feed:
It's very slow to update. At the time of writing, the RSS feed is currently outdated by 5 articles — the most recent of which was posted yesterday at 22:55 (strangely, the timestamp on the actual article is 21:55).
Article URLs are missing from the mark-up! The "link" tags that should enclose them are empty ("<link></link>").
Additionally, you should redirect the address of the old RSS feed to the address of the new one if possible. Unnecessarily breaking links harms the Web.