diff --git src/wp-admin/css/common.css src/wp-admin/css/common.css
index c52e183..03625a3 100644
--- src/wp-admin/css/common.css
+++ src/wp-admin/css/common.css
@@ -189,8 +189,18 @@ p.popular-tags,
 .widgets-holder-wrap,
 .popular-tags,
 .feature-filter,
-.imgedit-group {
+.imgedit-group,
+#link-color-example,
+.postbox {
 	background: #fff;
+	border-radius: 4px;
+	-moz-border-radius: 4px;
+	-webkit-border-radius: 4px;
+
+	/* Stop color "leaking." */
+	background-clip: padding-box;
+	-webkit-background-clip: padding-box; 
+	-moz-background-clip: padding; 
 }
 
 /* general */
@@ -1031,6 +1041,12 @@ form.upgrade .hint {
 	border-top: none;
 	-webkit-box-shadow: 0 1px 0 rgba(0,0,0,.025);
 	box-shadow: 0 1px 0 rgba(0,0,0,.025);
+	border-radius: 4px;
+	-moz-border-radius: 4px;
+	-webkit-border-radius: 4px;
+	background-clip: padding-box;
+	-webkit-background-clip: padding-box; 
+	-moz-background-clip: padding; 
 }
 
 #screen-options-link-wrap,
diff --git src/wp-admin/css/list-tables.css src/wp-admin/css/list-tables.css
index 62fc5b1..a0cf989 100644
--- src/wp-admin/css/list-tables.css
+++ src/wp-admin/css/list-tables.css
@@ -1011,20 +1011,11 @@ ul.cat-checklist {
 	position: relative;
 	top: -3px;
 }
-
+/*/*
 /*------------------------------------------------------------------------------
   17.0 - Plugins
 ------------------------------------------------------------------------------*/
 
-.plugins tbody th.check-column,
-.plugins tbody {
-	padding: 8px 0 0 2px;
-}
-
-.plugins tbody th.check-column input[type=checkbox] {
-	margin-top: 4px;
-}
-
 #update-plugins-table tbody td p {
 	margin-top: 0;
 }
@@ -1033,27 +1024,11 @@ ul.cat-checklist {
 	font-size: 14px;
 }
 
-.plugins thead th.check-column,
-.plugins tfoot th.check-column,
-.plugins .inactive th.check-column {
-	padding-left: 6px;
-}
-
 #update-plugins-table thead th.check-column,
 #update-plugins-table tfoot th.check-column {
 	padding-top: 11px;
 }
 
-.plugins,
-.plugins th,
-.plugins td {
-	color: #000;
-}
-
-.plugins tr {
-	background: #fff;
-}
-
 .plugins p {
 	margin: 0 4px;
 	padding: 0;
diff --git src/wp-admin/edit-form-comment.php src/wp-admin/edit-form-comment.php
index b2950f7..c58d6ec 100644
--- src/wp-admin/edit-form-comment.php
+++ src/wp-admin/edit-form-comment.php
@@ -23,7 +23,7 @@ if ( !defined('ABSPATH') )
 
 <div id="post-body" class="metabox-holder columns-2">
 <div id="post-body-content" class="edit-form-section">
-<div id="namediv" class="stuffbox">
+<div id="namediv" class="stuffbox postbox">
 <h3><label for="name"><?php _e( 'Author' ) ?></label></h3>
 <div class="inside">
 <table class="form-table editcomment">
@@ -70,7 +70,7 @@ if ( !defined('ABSPATH') )
 </div><!-- /post-body-content -->
 
 <div id="postbox-container-1" class="postbox-container">
-<div id="submitdiv" class="stuffbox" >
+<div id="submitdiv" class="stuffbox postbox" >
 <h3><span class="hndle"><?php _e('Status') ?></span></h3>
 <div class="inside">
 <div class="submitbox" id="submitcomment">
diff --git src/wp-admin/edit-link-form.php src/wp-admin/edit-link-form.php
index 610240a..08581f7 100644
--- src/wp-admin/edit-link-form.php
+++ src/wp-admin/edit-link-form.php
@@ -90,7 +90,7 @@ wp_nonce_field( 'meta-box-order', 'meta-box-order-nonce', false ); ?>
 
 <div id="post-body" class="metabox-holder columns-<?php echo 1 == get_current_screen()->get_columns() ? '1' : '2'; ?>">
 <div id="post-body-content">
-<div id="namediv" class="stuffbox">
+<div id="namediv" class="stuffbox postbox">
 <h3><label for="link_name"><?php _ex('Name', 'link name') ?></label></h3>
 <div class="inside">
 	<input type="text" name="link_name" size="30" maxlength="255" value="<?php echo esc_attr($link->link_name); ?>" id="link_name" />
@@ -98,7 +98,7 @@ wp_nonce_field( 'meta-box-order', 'meta-box-order-nonce', false ); ?>
 </div>
 </div>
 
-<div id="addressdiv" class="stuffbox">
+<div id="addressdiv" class="stuffbox postbox">
 <h3><label for="link_url"><?php _e('Web Address') ?></label></h3>
 <div class="inside">
 	<input type="text" name="link_url" size="30" maxlength="255" class="code" value="<?php echo esc_attr($link->link_url); ?>" id="link_url" />
@@ -106,7 +106,7 @@ wp_nonce_field( 'meta-box-order', 'meta-box-order-nonce', false ); ?>
 </div>
 </div>
 
-<div id="descriptiondiv" class="stuffbox">
+<div id="descriptiondiv" class="stuffbox postbox">
 <h3><label for="link_description"><?php _e('Description') ?></label></h3>
 <div class="inside">
 	<input type="text" name="link_description" size="30" maxlength="255" value="<?php echo isset($link->link_description) ? esc_attr($link->link_description) : ''; ?>" id="link_description" />
diff --git src/wp-admin/index.php src/wp-admin/index.php
index 3bd4c7c..1577f9a 100644
--- src/wp-admin/index.php
+++ src/wp-admin/index.php
@@ -96,7 +96,7 @@ include( ABSPATH . 'wp-admin/admin-header.php' );
 	<h2><?php echo esc_html( $title ); ?></h2>
 
 <?php if ( has_action( 'welcome_panel' ) && current_user_can( 'edit_theme_options' ) ) :
-	$classes = 'welcome-panel';
+	$classes = 'welcome-panel postbox';
 
 	$option = get_user_meta( get_current_user_id(), 'show_welcome_panel', true );
 	// 0 = hide, 1 = toggled to show or single site creator, 2 = multisite site owner
diff --git src/wp-content/themes/twentyeleven/inc/theme-options.css src/wp-content/themes/twentyeleven/inc/theme-options.css
index 464ab8c..5afd1c4 100644
--- src/wp-content/themes/twentyeleven/inc/theme-options.css
+++ src/wp-content/themes/twentyeleven/inc/theme-options.css
@@ -21,9 +21,6 @@
 	margin: 0 0 0 -2px;
 }
 #link-color-example {
-	-moz-border-radius: 4px;
-	-webkit-border-radius: 4px;
-	border-radius: 4px;
 	border: 1px solid #dfdfdf;
 	margin: 0 7px 0 3px;
 	padding: 4px 14px;