RSS Feed randomly gets displayed in either UTF-8 or ISO-8859-1

[2levelsabove]

It appears that our feed at http://alltherides.com/feed.xml is randomly being displayed in UTF-8 or ISO-8859-1

 

 

Whenever it is in UTF-8 it displays fine. WHen it is in ISO-8859-1 it shows up in just text form.

 

 

 

Any help at all ?????

 

We have used several headers like:

header('Content-Type: application/rss+xml; charset=utf-8');

 

 

but nothing seems to be working