Liferea (linux feed reader - http://liferea.sourceforge.net/) is unable to parse your RSS feed. I posted a bug report (https://sourceforge.net/tracker/?func=detail&atid=581684...) and they started to take care of it. Apparently, it's something with new line characters.

I've used Liferea for 3 years and AFAIR I didn't have any similar problems.

Reddit's feed is fine (in case you share the code - I'm not from around here...).