Ok after playing around with this some (you'll find that if you submit or edit an article now there's a space for a blurb) there are a few things we have to do for RSS.
1) All our blurbs must be valid XHTML, no more being lazy, that means all <br> tags and <img> tags have to be self-closing and all tags must be lowercase and have and end tag.
2) No special characters. No ' " $ % & * @ ect
Now for the fist one that means if you're using a WIZYWUG or other HTML editing program you need to find the option that makes what you do XHTML compliant, if there isn't one then you need to check everything by hand. One tag that's no properly closed and our feed goes bye-bye. RSS feeds are not forgiving of errors like browsers are.
For the second one I have a script that will encode the special characters to their Unicode equivalents (like & for &, ′ for ' ect.) so that's not something we have to worry about.
I have not made any of these changes live yet until after the Staff has a chance to discuss all the implications on how things will change if we do this.