Index: wp-includes/author-template.php
===================================================================
--- wp-includes/author-template.php	(révision 787)
+++ wp-includes/author-template.php	(révision 788)
@@ -204,7 +204,7 @@
 	$link = sprintf(
 		'<a href="%1$s" title="%2$s">%3$s</a>',
 		get_author_posts_url( $authordata->ID, $authordata->user_nicename ),
-		esc_attr( sprintf( __( 'Posts by %s' ), get_the_author() ) ),
+		esc_attr( sprintf( __( 'Posts by %s' ), get_the_author_meta('display_name') )),
 		get_the_author()
 	);
 	echo apply_filters( 'the_author_posts_link', $link );