diff --git a/blocks/admin_tree/block_admin_tree.php b/blocks/admin_tree/block_admin_tree.php
index 1dccaf7ee97..78cfe928e6d 100644
--- a/blocks/admin_tree/block_admin_tree.php
+++ b/blocks/admin_tree/block_admin_tree.php
@@ -179,7 +179,7 @@ class block_admin_tree extends block_base {
 
             $this->content->text .= '//]]>' . "\n";
             $this->content->text .= '</script>' . "\n";
-            $this->content->text .= '<div align="left">' . "\n";
+            $this->content->text .= '<div style="text-align:left">' . "\n";
 
             $this->content->text .= $this->tempcontent;
 
diff --git a/index.php b/index.php
index 3787ef9d0f8..2c87312c387 100644
--- a/index.php
+++ b/index.php
@@ -96,7 +96,7 @@
 ?>
 
 
-<table id="layout-table">
+<table id="layout-table" summary="">
   <tr>
   <?php
 
@@ -233,7 +233,7 @@
     if (blocks_have_content($pageblocks, BLOCK_POS_RIGHT) || $editing || has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
         echo '<td style="width: '.$preferred_width_right.'px;" id="right-column">';
         if (has_capability('moodle/course:update', get_context_instance(CONTEXT_SYSTEM, SITEID))) {
-            echo '<div align="center">'.update_course_icon($SITE->id).'</div>';
+            echo '<div style="text-align:center">'.update_course_icon($SITE->id).'</div>';
             echo '<br />';
         }
         blocks_print_group($PAGE, $pageblocks, BLOCK_POS_RIGHT);