So the problem was that the rss feed had this failure “XML Parsing Error: XML or text decleration not at start of external entityLocation: http://www.example.com Line Number 1, Column 2: <?xml version=”1.0″ encoding=”utf-8”?> when trying to add the feed.
The solution appears to be to delete whitespace before the <?php tag at the start of a file and and at the end after the closing ?>
This may need to be done to the wp-config.php, wp-rss2.php, index.php in the theme or the header includes, any of the likely suspects. Many blogs and forums around the net are reporting success with this, as did i, though not until i tried a different computer did it work, it also worked after i closed and re open the browser. Further testing has confirmed that clearing all the history from the tools menu in firefox is how i confirmed the fix.