Index: wp-admin/includes/template.php
===================================================================
--- wp-admin/includes/template.php	(revision 13712)
+++ wp-admin/includes/template.php	(working copy)
@@ -3738,7 +3738,8 @@
 			$per_page_label = __('Plugins per page:');
 			break;
 		default:
-			return '';
+			$per_page_label = apply_filters('per_page_label', '', $screen); // for plugins
+			if (empty($per_page_label)) return '';
 	}
 
 	$option = str_replace( '-', '_', "{$screen->id}_per_page" );
@@ -3771,7 +3772,8 @@
 	$return .= "<input type='submit' class='button' value='" . esc_attr__('Apply') . "' />";
 	$return .= "<input type='hidden' name='wp_screen_options[option]' value='" . esc_attr($option) . "' />";
 	$return .= "</div>\n";
-	return $return;
+
+	return apply_filters('screen_options', $return, $screen);  // for plugins
 }
 
 function screen_icon($screen = '') {