Index: wp-admin/import/wordpress.php
===================================================================
--- wp-admin/import/wordpress.php	(revision 7386)
+++ wp-admin/import/wordpress.php	(working copy)
@@ -338,7 +338,7 @@
 		$post_ID = (int) $this->get_tag( $post, 'wp:post_id' );
   		if ( $post_ID && !empty($this->post_ids_processed[$post_ID]) ) // Processed already
 			return 0;
-		
+
 		set_time_limit( 60 );
 
 		// There are only ever one of these
@@ -379,7 +379,7 @@
 			$cat_index++;
 		}
 
-		$post_exists = post_exists($post_title, '', $post_date);
+		$post_exists = post_exists($post_name, '', $post_date);
 
 		if ( $post_exists ) {
 			echo '<li>';
Index: wp-admin/includes/post.php
===================================================================
--- wp-admin/includes/post.php	(revision 7386)
+++ wp-admin/includes/post.php	(working copy)
@@ -190,14 +190,14 @@
 	return $post;
 }
 
-function post_exists($title, $content = '', $post_date = '') {
+function post_exists($post_name, $content = '', $post_date = '') {
 	global $wpdb;
 
 	if (!empty ($post_date))
 		$post_date = "AND post_date = '$post_date'";
 
-	if (!empty ($title))
-		return $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE post_title = '$title' $post_date");
+	if (!empty ($post_name))
+		return $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE post_name = '$post_name' $post_date");
 	else
 		if (!empty ($content))
 			return $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE post_content = '$content' $post_date");
@@ -609,7 +609,7 @@
 	if (in_array($post->post_status, array('draft', 'pending'))) {
 		$post->post_status = 'publish';
 		$post->post_date = date('Y-m-d H:i:s');
-		$post->post_name = sanitize_title($post->post_name? $post->post_name : $post->post_title, $post->ID); 
+		$post->post_name = sanitize_title($post->post_name? $post->post_name : $post->post_title, $post->ID);
 	}
 
 	// If the user wants to set a new name -- override the current one