Index: trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-plugins/inc/template-tags.php
===================================================================
--- trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-plugins/inc/template-tags.php	(revision 10559)
+++ trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-plugins/inc/template-tags.php	(working copy)
@@ -107,12 +107,16 @@
 function the_author_byline( $post = null ) {
 	$post = get_post( $post );
 
-	$url    = get_post_meta( $post->ID, 'header_author_uri', true );
-	$author = strip_tags( get_post_meta( $post->ID, 'header_author', true ) ) ?: get_the_author();
-	$author = $url ? '<a class="url fn n" rel="nofollow" href="' . esc_url( $url ) . '">' . $author . '</a>' : $author;
+	$committers = Tools::get_plugin_committers( $post->post_name );
 
-	/* translators: post author. */
-	printf( esc_html_x( 'By %s', 'post author', 'wporg-plugins' ), '<span class="author vcard">' . wp_kses_post( $author ) . '</span>' );
+	if ( $committers ) {
+		$url    = get_post_meta( $post->ID, 'header_author_uri', true );
+		$author = strip_tags( get_post_meta( $post->ID, 'header_author', true ) ) ?: get_the_author();
+		$author = $url ? '<a class="url fn n" rel="nofollow" href="' . esc_url( $url ) . '">' . $author . '</a>' : $author;
+
+		/* translators: post author. */
+		printf( esc_html_x( 'By %s', 'post author', 'wporg-plugins' ), '<span class="author vcard">' . wp_kses_post( $author ) . '</span>' );
+	}
 }
 
 /**