Fix My Feed RSS Repair
This is a simple yet powerful plugin to repair your wordpress RSS feed. This plugin will help you if you get an error that looks similar to this:
XML Parsing Error: XML or text declaration not at start of entity Location: http://www.yoursite.com/feed/ Line Number 2, Column 2: -^
If you get this error and have not been able to resolve your feed issues than this plugin is what you need. RSS repair adds a new item to your wordpress tools menu. After you do a core update or theme update and your feed stops working, apply the fix and your feed will be as good as new.
Code sources from: http://wejn.org/stuff/wejnswpwhitespacefix.php.html