RSS Not Working

I had posted previously and in detail about my RSS feed not working and the post seems to have been removed. In either case, a long story short cause I don’t want to type it all again is that my RSS feed just stopped working and I do not know why. I have disabled plugins, rest the theme back to the original as well as tried reinstalling WP. I have two blogs that I run and the issue seems to be with the 2.7.1 install as the 2.6 install seems to work fine. Has anyone else had issues with this?