Index: wp-admin/about.php
===================================================================
--- wp-admin/about.php	(revision 20969)
+++ wp-admin/about.php	(working copy)
@@ -52,9 +52,11 @@
 	<div class="feature-section">
 		<h4><?php _e( 'Flexible Sizes' ); ?></h4>
 		<p><?php _e( 'You can decide for yourself how tall or wide your custom header image should be. From now on, themes will provide a recommended image size for custom headers rather than a fixed requirement. Note: this feature requires <a href="http://codex.wordpress.org/Custom_Headers">theme support</a>.' ); ?></p>
-		<img src="<?php echo esc_url( admin_url( 'images/screenshots/flex-header-1.png' ) ); ?>" class="image-30" />
-		<img src="<?php echo esc_url( admin_url( 'images/screenshots/flex-header-2.png' ) ); ?>" class="image-30" />
-		<img src="<?php echo esc_url( admin_url( 'images/screenshots/flex-header-3.png' ) ); ?>" class="image-30" />
+		<div class="three-col-images">
+			<img src="<?php echo esc_url( admin_url( 'images/screenshots/flex-header-1.png' ) ); ?>" class="image-30 first-feature" />
+			<img src="<?php echo esc_url( admin_url( 'images/screenshots/flex-header-2.png' ) ); ?>" class="image-30" />
+			<img src="<?php echo esc_url( admin_url( 'images/screenshots/flex-header-3.png' ) ); ?>" class="image-30 last-feature" />
+		</div>
 	</div>
 
 	<div class="feature-section images-stagger-right">
@@ -65,6 +67,18 @@
 </div>
 
 <div class="changelog">
+	<h3><?php _e( 'Twitter Embeds' ); ?></h3>
+
+	<div class="feature-section images-stagger-left">
+		<img src="<?php echo esc_url( admin_url( 'images/screenshots/twitter-embed.png' ) ); ?>" class="image-50" />
+		<h4><?php _e( 'Share Tweets Right in Your Posts' ); ?></h4>
+		<p><?php _e( 'Twitter embeds allow you to display any individual tweet in a blog post or post comment, along with action links allowing readers to reply to, retweet, and favorite the tweet without leaving your site. Just paste a Tweet URL on its own line.' ); ?></p>
+	</div>
+
+</div>
+
+
+<div class="changelog">
 	<h3><?php _e( 'Better Captions' ); ?></h3>
 
 	<div class="feature-section images-stagger-right">
Index: wp-admin/css/colors-classic.dev.css
===================================================================
--- wp-admin/css/colors-classic.dev.css	(revision 20969)
+++ wp-admin/css/colors-classic.dev.css	(working copy)
@@ -2362,9 +2362,9 @@
 	background: #fff;
 	border-color: #dfdfdf;
 
-	-moz-box-shadow: 0 0 6px rgba( 0, 0, 0, 0.3 );
-	-webkit-box-shadow: 0 0 6px rgba( 0, 0, 0, 0.3 );
-	box-shadow: 0 0 6px rgba( 0, 0, 0, 0.3 );
+	-moz-box-shadow:    0 1px 3px rgba( 0, 0, 0, 0.3 );
+	-webkit-box-shadow: 0 1px 3px rgba( 0, 0, 0, 0.3 );
+	box-shadow:         0 1px 3px rgba( 0, 0, 0, 0.3 );
 }
 
 .about-wrap .point-releases {
Index: wp-admin/css/colors-fresh.dev.css
===================================================================
--- wp-admin/css/colors-fresh.dev.css	(revision 20969)
+++ wp-admin/css/colors-fresh.dev.css	(working copy)
@@ -1948,10 +1948,11 @@
 .about-wrap .feature-section img {
 	background: #fff;
 	border-color: #dfdfdf;
+	border: 1px #ccc solid;
 
-	-moz-box-shadow: 0 0 6px rgba( 0, 0, 0, 0.3 );
-	-webkit-box-shadow: 0 0 6px rgba( 0, 0, 0, 0.3 );
-	box-shadow: 0 0 6px rgba( 0, 0, 0, 0.3 );
+	-moz-box-shadow:    0 1px 3px rgba( 0, 0, 0, 0.3 );
+	-webkit-box-shadow: 0 1px 3px rgba( 0, 0, 0, 0.3 );
+	box-shadow:         0 1px 3px rgba( 0, 0, 0, 0.3 );
 }
 
 .about-wrap h4.wp-people-group {
Index: wp-admin/css/ie.dev.css
===================================================================
--- wp-admin/css/ie.dev.css	(revision 20969)
+++ wp-admin/css/ie.dev.css	(working copy)
@@ -439,6 +439,15 @@
 	margin: 0;
 }
 
+.about-wrap .three-col-images img {
+	margin: 0 0.6% 10px;
+}
+
+.about-wrap .three-col-images .last-feature,
+.about-wrap .three-col-images .first-feature {
+	float: none;
+}
+
 /* IE6 leftovers */
 * html .row-actions {
 	visibility: visible;
Index: wp-admin/css/wp-admin-rtl.dev.css
===================================================================
--- wp-admin/css/wp-admin-rtl.dev.css	(revision 20969)
+++ wp-admin/css/wp-admin-rtl.dev.css	(working copy)
@@ -1403,6 +1403,14 @@
 	margin-right: 3em;
 }
 
+.about-wrap .three-col-images .last-feature {
+	float: left;
+}
+
+.about-wrap .three-col-images .first-feature {
+	float: right;
+}
+
 .about-wrap .feature-section.three-col div {
 	margin-right: 0;
 	margin-left: 4.999999999%;
Index: wp-admin/css/wp-admin.dev.css
===================================================================
--- wp-admin/css/wp-admin.dev.css	(revision 20969)
+++ wp-admin/css/wp-admin.dev.css	(working copy)
@@ -5076,7 +5076,7 @@
 
 .about-wrap .feature-section img {
 	border: none;
-	margin: 0 0.7% 10px 0;
+	margin: 0 1.94% 10px 0;
 	-webkit-border-radius: 3px;
 	border-radius: 3px;
 }
@@ -5086,7 +5086,7 @@
 }
 
 .about-wrap .feature-section img.image-30 {
-	max-width: 32%;
+	max-width: 31.2381%;
 }
 
 .ie8 .about-wrap .feature-section img {
@@ -5123,6 +5123,22 @@
 	margin-right: 0;
 }
 
+.about-wrap .three-col-images {
+	text-align: center;
+}
+
+.about-wrap .three-col-images img {
+	margin: 0 0 10px;
+}
+
+.about-wrap .three-col-images .last-feature {
+	float: right;
+}
+
+.about-wrap .three-col-images .first-feature {
+	float: left;
+}
+
 .about-wrap .feature-section.images-stagger-right img {
 	float: right;
 	margin: 0 5px 12px 12px;
@@ -5130,7 +5146,7 @@
 
 .about-wrap .feature-section.images-stagger-left img {
 	float: left;
-	margin: 0 12px 12px 5px;
+	margin: 0 22px 12px 3px;
 }
 
 @media only screen and (max-width: 900px) {