diff --git a/src/wp-admin/css/wp-admin.css b/src/wp-admin/css/wp-admin.css
index 41b5c6750c..ba7c6d41b4 100644
--- a/src/wp-admin/css/wp-admin.css
+++ b/src/wp-admin/css/wp-admin.css
@@ -4321,6 +4321,7 @@ td.plugin-title p {
 
 #post-status-info {
 	width: 100%;
+	border-spacing: 0;
 }
 
 #post-status-info td {
@@ -5440,6 +5441,7 @@ p.popular-tags a {
 /* links tables */
 table.links-table {
 	width: 100%;
+	border-spacing: 0;
 }
 
 .links-table th {
diff --git a/src/wp-admin/edit-form-advanced.php b/src/wp-admin/edit-form-advanced.php
index 64a160cf6b..6eca74f229 100644
--- a/src/wp-admin/edit-form-advanced.php
+++ b/src/wp-admin/edit-form-advanced.php
@@ -487,7 +487,7 @@ if ( post_type_supports($post_type, 'editor') ) {
 		'add_unload_trigger' => false,
 	),
 ) ); ?>
-<table id="post-status-info" cellspacing="0"><tbody><tr>
+<table id="post-status-info"><tbody><tr>
 	<td id="wp-word-count"><?php printf( __( 'Word count: %s' ), '<span class="word-count">0</span>' ); ?></td>
 	<td class="autosave-info">
 	<span class="autosave-message">&nbsp;</span>
diff --git a/src/wp-admin/import.php b/src/wp-admin/import.php
index e85bf7012b..2284308ddd 100644
--- a/src/wp-admin/import.php
+++ b/src/wp-admin/import.php
@@ -76,7 +76,7 @@ if ( empty( $importers ) ) {
 } else {
 	uasort($importers, create_function('$a, $b', 'return strnatcasecmp($a[0], $b[0]);'));
 ?>
-<table class="widefat importers" cellspacing="0">
+<table class="widefat importers">
 
 <?php
 	$alt = '';
diff --git a/src/wp-admin/includes/ajax-actions.php b/src/wp-admin/includes/ajax-actions.php
index dca18a12a1..08d9de44b6 100644
--- a/src/wp-admin/includes/ajax-actions.php
+++ b/src/wp-admin/includes/ajax-actions.php
@@ -1419,7 +1419,7 @@ function wp_ajax_find_posts() {
 	if ( ! $posts )
 		wp_die( __('No items found.') );
 
-	$html = '<table class="widefat" cellspacing="0"><thead><tr><th class="found-radio"><br /></th><th>'.__('Title').'</th><th class="no-break">'.__('Type').'</th><th class="no-break">'.__('Date').'</th><th class="no-break">'.__('Status').'</th></tr></thead><tbody>';
+	$html = '<table class="widefat"><thead><tr><th class="found-radio"><br /></th><th>'.__('Title').'</th><th class="no-break">'.__('Type').'</th><th class="no-break">'.__('Date').'</th><th class="no-break">'.__('Status').'</th></tr></thead><tbody>';
 	foreach ( $posts as $post ) {
 		$title = trim( $post->post_title ) ? $post->post_title : __( '(no title)' );
 
diff --git a/src/wp-admin/includes/class-wp-comments-list-table.php b/src/wp-admin/includes/class-wp-comments-list-table.php
index 3fa1d7c2b7..58184bda17 100644
--- a/src/wp-admin/includes/class-wp-comments-list-table.php
+++ b/src/wp-admin/includes/class-wp-comments-list-table.php
@@ -316,7 +316,7 @@ class WP_Comments_List_Table extends WP_List_Table {
 		$this->display_tablenav( 'top' );
 
 ?>
-<table class="<?php echo implode( ' ', $this->get_table_classes() ); ?>" cellspacing="0">
+<table class="<?php echo implode( ' ', $this->get_table_classes() ); ?>">
 	<thead>
 	<tr>
 		<?php $this->print_column_headers(); ?>
@@ -602,7 +602,7 @@ class WP_Post_Comments_List_Table extends WP_Comments_List_Table {
 
 		wp_nonce_field( "fetch-list-" . get_class( $this ), '_ajax_fetch_list_nonce' );
 ?>
-<table class="<?php echo implode( ' ', $this->get_table_classes() ); ?>" cellspacing="0" style="display:none;">
+<table class="<?php echo implode( ' ', $this->get_table_classes() ); ?>" style="display:none;">
 	<tbody id="the-comment-list"<?php if ( $singular ) echo " data-wp-lists='list:$singular'"; ?>>
 		<?php if ( ! $output_empty ) $this->display_rows_or_placeholder(); ?>
 	</tbody>
diff --git a/src/wp-admin/includes/class-wp-list-table.php b/src/wp-admin/includes/class-wp-list-table.php
index f5db9dbbab..9fa3c8e3bf 100644
--- a/src/wp-admin/includes/class-wp-list-table.php
+++ b/src/wp-admin/includes/class-wp-list-table.php
@@ -773,7 +773,7 @@ class WP_List_Table {
 		$this->display_tablenav( 'top' );
 
 ?>
-<table class="wp-list-table <?php echo implode( ' ', $this->get_table_classes() ); ?>" cellspacing="0">
+<table class="wp-list-table <?php echo implode( ' ', $this->get_table_classes() ); ?>">
 	<thead>
 	<tr>
 		<?php $this->print_column_headers(); ?>
diff --git a/src/wp-admin/includes/media.php b/src/wp-admin/includes/media.php
index e3ffe9e5e8..dd00069b88 100644
--- a/src/wp-admin/includes/media.php
+++ b/src/wp-admin/includes/media.php
@@ -2139,7 +2139,7 @@ jQuery(function($){
 <form enctype="multipart/form-data" method="post" action="<?php echo esc_url( $form_action_url ); ?>" class="<?php echo $form_class; ?>" id="gallery-form">
 <?php wp_nonce_field('media-form'); ?>
 <?php //media_upload_form( $errors ); ?>
-<table class="widefat" cellspacing="0">
+<table class="widefat">
 <thead><tr>
 <th><?php _e('Media'); ?></th>
 <th class="order-head"><?php _e('Order'); ?></th>
diff --git a/src/wp-admin/includes/meta-boxes.php b/src/wp-admin/includes/meta-boxes.php
index 01ac430433..887026489b 100644
--- a/src/wp-admin/includes/meta-boxes.php
+++ b/src/wp-admin/includes/meta-boxes.php
@@ -900,7 +900,7 @@ function xfn_check( $class, $value = '', $deprecated = '' ) {
  */
 function link_xfn_meta_box($link) {
 ?>
-<table class="links-table" cellspacing="0">
+<table class="links-table">
 	<tr>
 		<th scope="row"><label for="link_rel"><?php /* translators: xfn: http://gmpg.org/xfn/ */ _e('rel:') ?></label></th>
 		<td><input type="text" name="link_rel" id="link_rel" value="<?php echo ( isset( $link->link_rel ) ? esc_attr($link->link_rel) : ''); ?>" /></td>
diff --git a/src/wp-admin/nav-menus.php b/src/wp-admin/nav-menus.php
index b59f61b3f0..0438b44a73 100644
--- a/src/wp-admin/nav-menus.php
+++ b/src/wp-admin/nav-menus.php
@@ -550,7 +550,7 @@ require_once( ABSPATH . 'wp-admin/admin-header.php' );
 	?>
 	<div id="menu-locations-wrap">
 		<form method="post" action="<?php echo esc_url( add_query_arg( array( 'action' => 'locations' ), admin_url( 'nav-menus.php' ) ) ); ?>">
-			<table class="widefat fixed" cellspacing="0" id="menu-locations-table">
+			<table class="widefat fixed" id="menu-locations-table">
 				<thead>
 				<tr>
 					<th scope="col" class="manage-column column-locations"><?php _e( 'Theme Location' ); ?></th>
diff --git a/src/wp-admin/update-core.php b/src/wp-admin/update-core.php
index 04faf2cb83..306199fe8d 100644
--- a/src/wp-admin/update-core.php
+++ b/src/wp-admin/update-core.php
@@ -220,7 +220,7 @@ function list_plugin_updates() {
 <form method="post" action="<?php echo esc_url( $form_action ); ?>" name="upgrade-plugins" class="upgrade">
 <?php wp_nonce_field('upgrade-core'); ?>
 <p><input id="upgrade-plugins" class="button" type="submit" value="<?php esc_attr_e('Update Plugins'); ?>" name="upgrade" /></p>
-<table class="widefat" cellspacing="0" id="update-plugins-table">
+<table class="widefat" id="update-plugins-table">
 	<thead>
 	<tr>
 		<th scope="col" class="manage-column check-column"><input type="checkbox" id="plugins-select-all" /></th>
@@ -298,7 +298,7 @@ function list_theme_updates() {
 <form method="post" action="<?php echo esc_url( $form_action ); ?>" name="upgrade-themes" class="upgrade">
 <?php wp_nonce_field('upgrade-core'); ?>
 <p><input id="upgrade-themes" class="button" type="submit" value="<?php esc_attr_e('Update Themes'); ?>" name="upgrade" /></p>
-<table class="widefat" cellspacing="0" id="update-themes-table">
+<table class="widefat" id="update-themes-table">
 	<thead>
 	<tr>
 		<th scope="col" class="manage-column check-column"><input type="checkbox" id="themes-select-all" /></th>