diff --git a/admin/includes/duplicate_product.php b/admin/includes/duplicate_product.php
index 0d6b3f709ad..0a8ea9a66bf 100644
--- a/admin/includes/duplicate_product.php
+++ b/admin/includes/duplicate_product.php
@@ -114,7 +114,8 @@ function woocommerce_duplicate_post_taxonomies($id, $new_id, $post_type) {
 	$taxonomies = get_object_taxonomies($post_type); //array("category", "post_tag");
 	foreach ($taxonomies as $taxonomy) {
 		$post_terms = wp_get_object_terms($id, $taxonomy);
-		for ($i=0; $i<count($post_terms); $i++) {
+		$post_terms_count = sizeof( $post_terms );
+		for ($i=0; $i<$post_terms_count; $i++) {
 			wp_set_object_terms($new_id, $post_terms[$i]->slug, $taxonomy, true);
 		}
 	}
diff --git a/admin/post-types/writepanels/writepanel-order_data.php b/admin/post-types/writepanels/writepanel-order_data.php
index f78d2511300..e9b7c56e2cf 100644
--- a/admin/post-types/writepanels/writepanel-order_data.php
+++ b/admin/post-types/writepanels/writepanel-order_data.php
@@ -646,8 +646,9 @@ function woocommerce_process_shop_order_meta( $post_id, $post ) {
 			$order_taxes_compound 	= isset($_POST['_order_taxes_compound']) ? $_POST['_order_taxes_compound'] : array();
 			$order_taxes_cart 		= $_POST['_order_taxes_cart'];
 			$order_taxes_shipping 	= $_POST['_order_taxes_shipping'];
+			$order_taxes_label_count = sizeof( $order_taxes_label );
 			
-			for ($i=0; $i<sizeof($order_taxes_label); $i++) :
+			for ($i=0; $i<$order_taxes_label_count; $i++) :
 				
 				// Add to array if the tax amount is set
 				if (!$order_taxes_cart[$i] && !$order_taxes_shipping[$i]) continue;
@@ -673,59 +674,62 @@ function woocommerce_process_shop_order_meta( $post_id, $post ) {
 		$order_items = array();
 	
 		if (isset($_POST['item_id'])) :
-			 $item_id			= $_POST['item_id'];
-			 $item_variation	= $_POST['item_variation'];
-			 $item_name 		= $_POST['item_name'];
-			 $item_quantity 	= $_POST['item_quantity'];
-			 
-			 $line_subtotal		= $_POST['line_subtotal'];
-			 $line_subtotal_tax	= $_POST['line_subtotal_tax'];
-			 
-			 $line_total 		= $_POST['line_total'];
-			 $line_tax		 	= $_POST['line_tax'];
-			 
-			 $item_meta_names 	= (isset($_POST['meta_name'])) ? $_POST['meta_name'] : '';
-			 $item_meta_values 	= (isset($_POST['meta_value'])) ? $_POST['meta_value'] : '';
-			 
-			 $item_tax_class	= $_POST['item_tax_class'];
-	
-			 for ($i=0; $i<sizeof($item_id); $i++) :
+			$item_id			= $_POST['item_id'];
+			$item_variation	= $_POST['item_variation'];
+			$item_name 		= $_POST['item_name'];
+			$item_quantity 	= $_POST['item_quantity'];
+			
+			$line_subtotal		= $_POST['line_subtotal'];
+			$line_subtotal_tax	= $_POST['line_subtotal_tax'];
+			
+			$line_total 		= $_POST['line_total'];
+			$line_tax		 	= $_POST['line_tax'];
+			
+			$item_meta_names 	= (isset($_POST['meta_name'])) ? $_POST['meta_name'] : '';
+			$item_meta_values 	= (isset($_POST['meta_value'])) ? $_POST['meta_value'] : '';
+			
+			$item_tax_class	= $_POST['item_tax_class'];
+			
+			$item_id_count = sizeof( $item_id );
+			
+			for ($i=0; $i<$item_id_count; $i++) :
+				
+				if (!isset($item_id[$i]) || !$item_id[$i]) continue;
+				if (!isset($item_name[$i])) continue;
+				if (!isset($item_quantity[$i]) || $item_quantity[$i] < 1) continue;
+				if (!isset($line_total[$i])) continue;
+				if (!isset($line_tax[$i])) continue;
+				
+				// Meta
+				$item_meta 		= new order_item_meta();
+				
+				if (isset($item_meta_names[$i]) && isset($item_meta_values[$i])) :
+			 	$meta_names 	= $item_meta_names[$i];
+			 	$meta_values 	= $item_meta_values[$i];
+			 	$meta_names_count = sizeof( $meta_names );
 			 	
-			 	if (!isset($item_id[$i]) || !$item_id[$i]) continue;
-			 	if (!isset($item_name[$i])) continue;
-			 	if (!isset($item_quantity[$i]) || $item_quantity[$i] < 1) continue;
-			 	if (!isset($line_total[$i])) continue;
-			 	if (!isset($line_tax[$i])) continue;
-			 	
-			 	// Meta
-			 	$item_meta 		= new order_item_meta();
-			 	
-			 	if (isset($item_meta_names[$i]) && isset($item_meta_values[$i])) :
-				 	$meta_names 	= $item_meta_names[$i];
-				 	$meta_values 	= $item_meta_values[$i];
-				 	
-				 	for ($ii=0; $ii<sizeof($meta_names); $ii++) :
-				 		$meta_name 		= esc_attr( $meta_names[$ii] );
-				 		$meta_value 	= esc_attr( $meta_values[$ii] );
-				 		if ($meta_name && $meta_value) :
-				 			$item_meta->add( $meta_name, $meta_value );
-				 		endif;
-				 	endfor;
-			 	endif;
-			 	
-			 	// Add to array	 	
-			 	$order_items[] = apply_filters('update_order_item', array(
-			 		'id' 				=> htmlspecialchars(stripslashes($item_id[$i])),
-			 		'variation_id' 		=> (int) $item_variation[$i],
-			 		'name' 				=> htmlspecialchars(stripslashes($item_name[$i])),
-			 		'qty' 				=> (int) $item_quantity[$i],
-			 		'line_total' 		=> rtrim(rtrim(number_format(woocommerce_clean($line_total[$i]), 4, '.', ''), '0'), '.'),
-			 		'line_tax'			=> rtrim(rtrim(number_format(woocommerce_clean($line_tax[$i]), 4, '.', ''), '0'), '.'),
-			 		'line_subtotal'		=> rtrim(rtrim(number_format(woocommerce_clean($line_subtotal[$i]), 4, '.', ''), '0'), '.'),
-			 		'line_subtotal_tax' => rtrim(rtrim(number_format(woocommerce_clean($line_subtotal_tax[$i]), 4, '.', ''), '0'), '.'),
-			 		'item_meta'			=> $item_meta->meta,
-			 		'tax_class'			=> woocommerce_clean($item_tax_class[$i])
-			 	));
+			 	for ($ii=0; $ii<$meta_names_count; $ii++) :
+			 		$meta_name 		= esc_attr( $meta_names[$ii] );
+			 		$meta_value 	= esc_attr( $meta_values[$ii] );
+			 		if ($meta_name && $meta_value) :
+			 			$item_meta->add( $meta_name, $meta_value );
+			 		endif;
+			 	endfor;
+				endif;
+				
+				// Add to array	 	
+				$order_items[] = apply_filters('update_order_item', array(
+					'id' 				=> htmlspecialchars(stripslashes($item_id[$i])),
+					'variation_id' 		=> (int) $item_variation[$i],
+					'name' 				=> htmlspecialchars(stripslashes($item_name[$i])),
+					'qty' 				=> (int) $item_quantity[$i],
+					'line_total' 		=> rtrim(rtrim(number_format(woocommerce_clean($line_total[$i]), 4, '.', ''), '0'), '.'),
+					'line_tax'			=> rtrim(rtrim(number_format(woocommerce_clean($line_tax[$i]), 4, '.', ''), '0'), '.'),
+					'line_subtotal'		=> rtrim(rtrim(number_format(woocommerce_clean($line_subtotal[$i]), 4, '.', ''), '0'), '.'),
+					'line_subtotal_tax' => rtrim(rtrim(number_format(woocommerce_clean($line_subtotal_tax[$i]), 4, '.', ''), '0'), '.'),
+					'item_meta'			=> $item_meta->meta,
+					'tax_class'			=> woocommerce_clean($item_tax_class[$i])
+				));
 			 	
 			 endfor; 
 		endif;	
diff --git a/admin/post-types/writepanels/writepanel-order_downloads.php b/admin/post-types/writepanels/writepanel-order_downloads.php
index 5bfd3cfb7ef..ba0008fab4b 100644
--- a/admin/post-types/writepanels/writepanel-order_downloads.php
+++ b/admin/post-types/writepanels/writepanel-order_downloads.php
@@ -257,8 +257,8 @@ function woocommerce_order_downloads_save( $post_id, $post ) {
 		$order_key = get_post_meta($post->ID, '_order_key', true);
 		$customer_email = get_post_meta($post->ID, '_billing_email', true);
 		$customer_user = (int) get_post_meta($post->ID, '_customer_user', true);
-
-		for ($i=0; $i<sizeof($download_ids); $i++) :
+		$download_ids_count = sizeof( $download_ids );
+		for ($i=0; $i<$download_ids_count; $i++) :
 
             $data = array(
 				'user_id'				=> $customer_user,
diff --git a/admin/post-types/writepanels/writepanel-product-type-variable.php b/admin/post-types/writepanels/writepanel-product-type-variable.php
index d1863b646eb..e8d746e3da3 100644
--- a/admin/post-types/writepanels/writepanel-product-type-variable.php
+++ b/admin/post-types/writepanels/writepanel-product-type-variable.php
@@ -751,7 +751,9 @@ function process_product_meta_variable( $post_id ) {
 			
 		$attributes = (array) maybe_unserialize( get_post_meta($post_id, '_product_attributes', true) );
 		
-		for ( $i=0; $i <= max( array_keys( $_POST['variable_post_id'] ) ); $i++ ) :
+		$max_loop = max( array_keys( $_POST['variable_post_id'] ) );
+		
+		for ( $i=0; $i <= $max_loop; $i++ ) :
 			
 			if ( ! isset( $variable_post_id[$i] ) ) continue;
 			
diff --git a/admin/post-types/writepanels/writepanel-product_data.php b/admin/post-types/writepanels/writepanel-product_data.php
index b8623424c9b..e1357ad94ed 100644
--- a/admin/post-types/writepanels/writepanel-product_data.php
+++ b/admin/post-types/writepanels/writepanel-product_data.php
@@ -575,24 +575,26 @@ function woocommerce_process_product_meta( $post_id, $post ) {
 	$attributes = array();
 	
 	if (isset($_POST['attribute_names'])) :
-		 $attribute_names = $_POST['attribute_names'];
-		 $attribute_values = $_POST['attribute_values'];
-		 if (isset($_POST['attribute_visibility'])) $attribute_visibility = $_POST['attribute_visibility'];
-		 if (isset($_POST['attribute_variation'])) $attribute_variation = $_POST['attribute_variation'];
-		 $attribute_is_taxonomy = $_POST['attribute_is_taxonomy'];
-		 $attribute_position = $_POST['attribute_position'];
-
-		 for ($i=0; $i<sizeof($attribute_names); $i++) :
-		 	if (!($attribute_names[$i])) continue;
-		 	
-		 	$is_visible = (isset($attribute_visibility[$i])) ? 1 : 0;
-		 	$is_variation = (isset($attribute_variation[$i])) ? 1 : 0;
-		 	
-		 	$is_taxonomy = ($attribute_is_taxonomy[$i]) ? 1 : 0;
-		 	
-		 	if ( $is_taxonomy ) {
-		 		if ( isset( $attribute_values[$i] ) ) {
-		 		
+		$attribute_names = $_POST['attribute_names'];
+		$attribute_values = $_POST['attribute_values'];
+		if (isset($_POST['attribute_visibility'])) $attribute_visibility = $_POST['attribute_visibility'];
+		if (isset($_POST['attribute_variation'])) $attribute_variation = $_POST['attribute_variation'];
+		$attribute_is_taxonomy = $_POST['attribute_is_taxonomy'];
+		$attribute_position = $_POST['attribute_position'];
+		
+		$attribute_names_count = sizeof( $attribute_names );
+		
+		for ($i=0; $i<$attribute_names_count; $i++) :
+			if (!($attribute_names[$i])) continue;
+			
+			$is_visible = (isset($attribute_visibility[$i])) ? 1 : 0;
+			$is_variation = (isset($attribute_variation[$i])) ? 1 : 0;
+			
+			$is_taxonomy = ($attribute_is_taxonomy[$i]) ? 1 : 0;
+			
+			if ( $is_taxonomy ) {
+				if ( isset( $attribute_values[$i] ) ) {
+				
 			 		// Format values
 			 		if ( is_array( $attribute_values[$i] ) ) {
 				 		$values = array_map('htmlspecialchars', array_map('stripslashes', $attribute_values[$i]));
@@ -609,7 +611,7 @@ function woocommerce_process_product_meta( $post_id, $post ) {
 			 		// Update post terms
 			 		if ( taxonomy_exists( $attribute_names[$i] ) )
 			 			wp_set_object_terms( $post_id, $values, $attribute_names[$i] );
-	
+			
 			 		if ( $values ) {
 				 		// Add attribute to array, but don't set values
 				 		$attributes[ sanitize_title( $attribute_names[$i] ) ] = array(
diff --git a/admin/woocommerce-admin-settings-forms.php b/admin/woocommerce-admin-settings-forms.php
index 839c3d36608..ddb9fd5d95f 100644
--- a/admin/woocommerce-admin-settings-forms.php
+++ b/admin/woocommerce-admin-settings-forms.php
@@ -28,8 +28,8 @@ function woocommerce_update_options($options) {
     		$tax_postcode 		= (isset($_POST['tax_postcode'])) ? $_POST['tax_postcode'] : array();
     		$tax_compound 		= (isset($_POST['tax_compound'])) ? $_POST['tax_compound'] : array();
     		$tax_label 			= (isset($_POST['tax_label'])) ? $_POST['tax_label'] : array();
-			
-			for ($i=0; $i<sizeof($tax_classes); $i++) :
+			$tax_classes_count	= sizeof( $tax_classes );
+			for ($i=0; $i<$tax_classes_count; $i++) :
 				
 				if (isset($tax_classes[$i]) && isset($tax_countries[$i]) && isset($tax_rate[$i]) && is_numeric($tax_rate[$i])) :
 					
@@ -84,8 +84,8 @@ function woocommerce_update_options($options) {
     		$tax_postcode 		= (isset($_POST['local_tax_postcode'])) ? $_POST['local_tax_postcode'] : array();
     		$tax_compound 		= (isset($_POST['local_tax_compound'])) ? $_POST['local_tax_compound'] : array();
     		$tax_label 			= (isset($_POST['local_tax_label'])) ? $_POST['local_tax_label'] : array();
-			
-			for ($i=0; $i<sizeof($tax_classes); $i++) :
+			$tax_classes_count	= sizeof( $tax_classes );
+			for ($i=0; $i<$tax_classes_count; $i++) :
 			
 				if (isset($tax_classes[$i]) && isset($tax_countries[$i]) && isset($tax_rate[$i]) && is_numeric($tax_rate[$i])) :