I found the error through Functions.php. Also, it depends on yoru site layout -- I found out that I busted the feed through having 2 calls to the dynamic sidebars (as I was using 2 separate designs). You don't need two arrays for the dynamic sidebars, everything should be in one array (am I terming this correctly? I'm talking about:
if ( function_exists('register_sidebar') )
'before_widget' => '',
'after_widget' => '',
'before_title' => '<h2>',
'after_title' => '</h2>', ));
so don't just check the files for spaces (that may be moot). Make sure the PHP is valid in the functions file.