Edit

Edit: feed-rss.php

<?php
/**
 * RSS 0.92 Feed Template for displaying RSS 0.92 Posts feed.
 *
 * @package WordPress
 */

header( 'Content-Type: ' . feed_content_type( 'rss' ) . '; charset=' . get_option( 'blog_charset' ), true );
$more = 1;

echo '<?xml version="1.0" encoding="' . get_option( 'blog_charset' ) . '"?' . '>'; ?>
<rss version="0.92">
<channel>
	<title><?php wp_title_rss(); ?></title>
	<link><?php bloginfo_rss( 'url' ); ?></link>
	<description><?php bloginfo_rss( 'description' ); ?></description>
	<lastBuildDate><?php echo get_feed_build_date( 'D, d M Y H:i:s +0000' ); ?></lastBuildDate>
	<docs>http://backend.userland.com/rss092</docs>
	<language><?php bloginfo_rss( 'language' ); ?></language>
	<?php
	/**
	 * Fires at the end of the RSS Feed Header.
	 *
	 * @since 2.0.0
	 */
	do_action( 'rss_head' );
	?>

<?php
while ( have_posts() ) :
	the_post();
	?>
	<item>
		<title><?php the_title_rss(); ?></title>
		<description><![CDATA[<?php the_excerpt_rss(); ?>]]></description>
		<link><?php the_permalink_rss(); ?></link>
		<?php
		/**
		 * Fires at the end of each RSS feed item.
		 *
		 * @since 2.0.0
		 */
		do_action( 'rss_item' );
		?>
	</item>
<?php endwhile; ?>
</channel>
</rss>

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