Problems with subscription

Hi folks. I am new to the WP world, but I can already say I think I am here to stay for a while.

When I click on the link to subscribe (right next to the rss icon) to an article ( http://reallystupidsite.com/feed ) I end up getting a 404 error.

I figure I have set something up incorrectly, I just don’t know what.

Any and all help is appreciated.

Shmengy out.