Make firefox and IE render the RSS feed instead of prompting to download it. will help with similar problems in other browsers as well.

instructions:
1. download file
2. use it to replace /textpattern/publish/rss.php on your site
3. enjoy!

A simple one-line addition to both rss.php and atom.php will allow for displaying a link to comments inside the body of your website’s feeds:

Customize XML feeds to allow for both full articles and excerpts.