diff --git a/wp-content/themes/twentyten/archive.php b/wp-content/themes/twentyten/archive.php
index 83d1397f7b..8a8eb2a8b2 100644
--- a/wp-content/themes/twentyten/archive.php
+++ b/wp-content/themes/twentyten/archive.php
@@ -54,7 +54,7 @@ get_header(); ?>
 	 * If you want to overload this in a child theme then include a file
 	 * called loop-archive.php and that will be used instead.
 	 */
-	 get_template_part( 'loop', 'archive' );
+	get_template_part( 'loop', 'archive' );
 ?>
 
 			</div><!-- #content -->
diff --git a/wp-content/themes/twentyten/author.php b/wp-content/themes/twentyten/author.php
index 8b42064e31..2b221b57f2 100644
--- a/wp-content/themes/twentyten/author.php
+++ b/wp-content/themes/twentyten/author.php
@@ -25,7 +25,7 @@ get_header(); ?>
 		the_post();
 ?>
 
-				<h1 class="page-title author"><?php printf( __( 'Author Archives: %s', 'twentyten' ), "<span class='vcard'><a class='url fn n' href='" . get_author_posts_url( get_the_author_meta( 'ID' ) ) . "' title='" . esc_attr( get_the_author() ) . "' rel='me'>" . get_the_author() . "</a></span>" ); ?></h1>
+				<h1 class="page-title author"><?php printf( __( 'Author Archives: %s', 'twentyten' ), '<span class="vcard"><a class="url fn n" href="' . esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ) . '" title="' . esc_attr( get_the_author() ) . '" rel="me">' . get_the_author() . '</a></span>' ); ?></h1>
 
 <?php
 // If a user has filled out their description, show a bio on their entries.
@@ -63,7 +63,7 @@ if ( get_the_author_meta( 'description' ) ) : ?>
 	 * If you want to overload this in a child theme then include a file
 	 * called loop-author.php and that will be used instead.
 	 */
-	 get_template_part( 'loop', 'author' );
+	get_template_part( 'loop', 'author' );
 ?>
 			</div><!-- #content -->
 		</div><!-- #container -->
diff --git a/wp-content/themes/twentyten/footer.php b/wp-content/themes/twentyten/footer.php
index de19556f3b..90368af364 100644
--- a/wp-content/themes/twentyten/footer.php
+++ b/wp-content/themes/twentyten/footer.php
@@ -24,7 +24,7 @@
 ?>
 
 			<div id="site-info">
-				<a href="<?php echo home_url( '/' ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home">
+				<a href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home">
 					<?php bloginfo( 'name' ); ?>
 				</a>
 			</div><!-- #site-info -->
diff --git a/wp-content/themes/twentyten/functions.php b/wp-content/themes/twentyten/functions.php
index 75b6ba46d4..efd69f260a 100644
--- a/wp-content/themes/twentyten/functions.php
+++ b/wp-content/themes/twentyten/functions.php
@@ -570,7 +570,7 @@ function twentyten_get_gallery_images() {
 	if ( function_exists( 'get_post_galleries' ) ) {
 		$galleries = get_post_galleries( get_the_ID(), false );
 		if ( isset( $galleries[0]['ids'] ) )
-		 	$images = explode( ',', $galleries[0]['ids'] );
+			$images = explode( ',', $galleries[0]['ids'] );
 	} else {
 		$pattern = get_shortcode_regex();
 		preg_match( "/$pattern/s", get_the_content(), $match );
diff --git a/wp-content/themes/twentyten/header.php b/wp-content/themes/twentyten/header.php
index 494b866191..1ff063b8f0 100644
--- a/wp-content/themes/twentyten/header.php
+++ b/wp-content/themes/twentyten/header.php
@@ -30,7 +30,7 @@
 
 	// Add a page number if necessary:
 	if ( ( $paged >= 2 || $page >= 2 ) && ! is_404() )
-		echo ' | ' . sprintf( __( 'Page %s', 'twentyten' ), max( $paged, $page ) );
+		echo esc_html( ' | ' . sprintf( __( 'Page %s', 'twentyten' ), max( $paged, $page ) ) );
 
 	?></title>
 <link rel="profile" href="http://gmpg.org/xfn/11" />
@@ -62,7 +62,7 @@
 				<?php $heading_tag = ( is_home() || is_front_page() ) ? 'h1' : 'div'; ?>
 				<<?php echo $heading_tag; ?> id="site-title">
 					<span>
-						<a href="<?php echo home_url( '/' ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a>
+						<a href="<?php echo esc_url( home_url( '/' ) ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home"><?php bloginfo( 'name' ); ?></a>
 					</span>
 				</<?php echo $heading_tag; ?>>
 				<div id="site-description"><?php bloginfo( 'description' ); ?></div>
@@ -96,7 +96,7 @@
 							$header_image_height = HEADER_IMAGE_HEIGHT;
 						}
 					?>
-						<img src="<?php header_image(); ?>" width="<?php echo $header_image_width; ?>" height="<?php echo $header_image_height; ?>" alt="" />
+						<img src="<?php header_image(); ?>" width="<?php echo esc_attr( $header_image_width ); ?>" height="<?php echo esc_attr( $header_image_height ); ?>" alt="" />
 					<?php endif; ?>
 			</div><!-- #branding -->
 
diff --git a/wp-content/themes/twentyten/index.php b/wp-content/themes/twentyten/index.php
index 4017f15957..0f02b6054c 100644
--- a/wp-content/themes/twentyten/index.php
+++ b/wp-content/themes/twentyten/index.php
@@ -24,7 +24,7 @@ get_header(); ?>
 			 * If you want to overload this in a child theme then include a file
 			 * called loop-index.php and that will be used instead.
 			 */
-			 get_template_part( 'loop', 'index' );
+			get_template_part( 'loop', 'index' );
 			?>
 			</div><!-- #content -->
 		</div><!-- #container -->
diff --git a/wp-content/themes/twentyten/loop-attachment.php b/wp-content/themes/twentyten/loop-attachment.php
index 26e213eec0..9c89cbbe03 100644
--- a/wp-content/themes/twentyten/loop-attachment.php
+++ b/wp-content/themes/twentyten/loop-attachment.php
@@ -80,7 +80,7 @@
 			$next_attachment_url = get_attachment_link( $attachments[ $k ]->ID );
 		else
 			// or get the URL of the first image attachment
-			$next_attachment_url = get_attachment_link( $attachments[ 0 ]->ID );
+			$next_attachment_url = get_attachment_link( $attachments[0]->ID );
 	} else {
 		// or, if there's only 1 image attachment, get the URL of the image
 		$next_attachment_url = wp_get_attachment_url();
@@ -111,10 +111,10 @@
 							<div class="nav-next"><?php next_image_link( false ); ?></div>
 						</div><!-- #nav-below -->
 <?php else : ?>
-						<a href="<?php echo esc_url( wp_get_attachment_url() ); ?>" title="<?php the_title_attribute(); ?>" rel="attachment"><?php echo basename( get_permalink() ); ?></a>
+						<a href="<?php echo esc_url( wp_get_attachment_url() ); ?>" title="<?php the_title_attribute(); ?>" rel="attachment"><?php echo esc_html( basename( get_permalink() ) ); ?></a>
 <?php endif; ?>
 						</div><!-- .entry-attachment -->
-						<div class="entry-caption"><?php if ( !empty( $post->post_excerpt ) ) the_excerpt(); ?></div>
+						<div class="entry-caption"><?php if ( ! empty( $post->post_excerpt ) ) the_excerpt(); ?></div>
 
 <?php the_content( __( 'Continue reading <span class="meta-nav">&rarr;</span>', 'twentyten' ) ); ?>
 <?php wp_link_pages( array( 'before' => '<div class="page-link">' . __( 'Pages:', 'twentyten' ), 'after' => '</div>' ) ); ?>
diff --git a/wp-content/themes/twentyten/loop-single.php b/wp-content/themes/twentyten/loop-single.php
index a894b37da4..e135660bbd 100644
--- a/wp-content/themes/twentyten/loop-single.php
+++ b/wp-content/themes/twentyten/loop-single.php
@@ -46,7 +46,7 @@
 							<h2><?php printf( __( 'About %s', 'twentyten' ), get_the_author() ); ?></h2>
 							<?php the_author_meta( 'description' ); ?>
 							<div id="author-link">
-								<a href="<?php echo get_author_posts_url( get_the_author_meta( 'ID' ) ); ?>" rel="author">
+								<a href="<?php echo esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ); ?>" rel="author">
 									<?php printf( __( 'View all posts by %s <span class="meta-nav">&rarr;</span>', 'twentyten' ), get_the_author() ); ?>
 								</a>
 							</div><!-- #author-link	-->
diff --git a/wp-content/themes/twentyten/loop.php b/wp-content/themes/twentyten/loop.php
index 2d675b6684..bae55f0462 100644
--- a/wp-content/themes/twentyten/loop.php
+++ b/wp-content/themes/twentyten/loop.php
@@ -81,7 +81,7 @@
 							<a class="size-thumbnail" href="<?php the_permalink(); ?>"><?php echo wp_get_attachment_image( $image, 'thumbnail' ); ?></a>
 						</div><!-- .gallery-thumb -->
 						<p><em><?php printf( _n( 'This gallery contains <a %1$s>%2$s photo</a>.', 'This gallery contains <a %1$s>%2$s photos</a>.', $total_images, 'twentyten' ),
-								'href="' . get_permalink() . '" title="' . esc_attr( sprintf( __( 'Permalink to %s', 'twentyten' ), the_title_attribute( 'echo=0' ) ) ) . '" rel="bookmark"',
+								'href="' . esc_url( get_permalink() ) . '" title="' . esc_attr( sprintf( __( 'Permalink to %s', 'twentyten' ), the_title_attribute( 'echo=0' ) ) ) . '" rel="bookmark"',
 								number_format_i18n( $total_images )
 							); ?></em></p>
 				<?php endif; // end twentyten_get_gallery_images() check ?>
@@ -91,10 +91,10 @@
 
 			<div class="entry-utility">
 			<?php if ( function_exists( 'get_post_format' ) && 'gallery' == get_post_format( $post->ID ) ) : ?>
-				<a href="<?php echo get_post_format_link( 'gallery' ); ?>" title="<?php esc_attr_e( 'View Galleries', 'twentyten' ); ?>"><?php _e( 'More Galleries', 'twentyten' ); ?></a>
+				<a href="<?php echo esc_url( get_post_format_link( 'gallery' ) ); ?>" title="<?php esc_attr_e( 'View Galleries', 'twentyten' ); ?>"><?php _e( 'More Galleries', 'twentyten' ); ?></a>
 				<span class="meta-sep">|</span>
 			<?php elseif ( $gallery = get_term_by( 'slug', _x( 'gallery', 'gallery category slug', 'twentyten' ), 'category' ) && in_category( $gallery->term_id ) ) : ?>
-				<a href="<?php echo get_category_link( $gallery ); ?>" title="<?php esc_attr_e( 'View posts in the Gallery category', 'twentyten' ); ?>"><?php _e( 'More Galleries', 'twentyten' ); ?></a>
+				<a href="<?php echo esc_url( get_category_link( $gallery ) ); ?>" title="<?php esc_attr_e( 'View posts in the Gallery category', 'twentyten' ); ?>"><?php _e( 'More Galleries', 'twentyten' ); ?></a>
 				<span class="meta-sep">|</span>
 			<?php endif; ?>
 				<span class="comments-link"><?php comments_popup_link( __( 'Leave a comment', 'twentyten' ), __( '1 Comment', 'twentyten' ), __( '% Comments', 'twentyten' ) ); ?></span>
diff --git a/wp-content/themes/twentyten/onecolumn-page.php b/wp-content/themes/twentyten/onecolumn-page.php
index 5693232aa1..457e04bbda 100644
--- a/wp-content/themes/twentyten/onecolumn-page.php
+++ b/wp-content/themes/twentyten/onecolumn-page.php
@@ -23,7 +23,7 @@ get_header(); ?>
 			 * If you want to overload this in a child theme then include a file
 			 * called loop-page.php and that will be used instead.
 			 */
-			 get_template_part( 'loop', 'page' );
+			get_template_part( 'loop', 'page' );
 			?>
 
 			</div><!-- #content -->
diff --git a/wp-content/themes/twentyten/search.php b/wp-content/themes/twentyten/search.php
index 973ca77a44..a3fa97bd67 100644
--- a/wp-content/themes/twentyten/search.php
+++ b/wp-content/themes/twentyten/search.php
@@ -20,7 +20,7 @@ get_header(); ?>
 				 * If you want to overload this in a child theme then include a file
 				 * called loop-search.php and that will be used instead.
 				 */
-				 get_template_part( 'loop', 'search' );
+				get_template_part( 'loop', 'search' );
 				?>
 <?php else : ?>
 				<div id="post-0" class="post no-results not-found">
diff --git a/wp-content/themes/twentyten/style.css b/wp-content/themes/twentyten/style.css
index 9f6668ff74..9a3749fbd7 100644
--- a/wp-content/themes/twentyten/style.css
+++ b/wp-content/themes/twentyten/style.css
@@ -7,7 +7,7 @@ Author URI: http://wordpress.org/
 Version: 1.8
 License: GNU General Public License v2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
-Tags: black, blue, white, two-columns, fixed-layout, custom-header, custom-background, threaded-comments, sticky-post, translation-ready, microformats, rtl-language-support, editor-style, custom-menu, flexible-header
+Tags: black, blue, white, two-columns, fixed-layout, custom-header, custom-background, threaded-comments, sticky-post, translation-ready, microformats, rtl-language-support, editor-style, custom-menu, flexible-header, featured-images, featured-image-header
 Text Domain: twentyten
 */
 
diff --git a/wp-content/themes/twentyten/tag.php b/wp-content/themes/twentyten/tag.php
index 7ad81db6bd..01ae6cd36c 100644
--- a/wp-content/themes/twentyten/tag.php
+++ b/wp-content/themes/twentyten/tag.php
@@ -22,7 +22,7 @@ get_header(); ?>
  * If you want to overload this in a child theme then include a file
  * called loop-tag.php and that will be used instead.
  */
- get_template_part( 'loop', 'tag' );
+get_template_part( 'loop', 'tag' );
 ?>
 			</div><!-- #content -->
 		</div><!-- #container -->
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 4b9e898c72..1615098876 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-alpha-31265';
+$wp_version = '4.2-alpha-31266';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.