diff --git a/wp-admin/css/wp-admin-rtl.dev.css b/wp-admin/css/wp-admin-rtl.dev.css
index 2232a943a..a0e42ddcd 100644
--- a/wp-admin/css/wp-admin-rtl.dev.css
+++ b/wp-admin/css/wp-admin-rtl.dev.css
@@ -41,6 +41,7 @@ TABLE OF CONTENTS:
 23.0 - Misc
 24.0 - Dead
 25.0 - TinyMCE tweaks
+26.0 - Full Overlay w/ Sidebar
 
 
 ------------------------------------------------------------------------------*/
@@ -1471,6 +1472,90 @@ table .column-rating {
 	float: left;
 }
 
+/*------------------------------------------------------------------------------
+  26.0 - Full Overlay w/ Sidebar
+------------------------------------------------------------------------------*/
+.wp-full-overlay.collapsed,
+.wp-full-overlay.collapsed div.wp-full-overlay-header,
+.wp-full-overlay.collapsed div.wp-full-overlay-footer {
+	left: 0;
+	right: -302px;
+}
+
+.wp-full-overlay-sidebar {
+	box-shadow: inset 11px 0 8px -8px rgba( 0, 0, 0, 0.1 );
+	border-right: 0;
+	border-left: 1px solid rgba( 0, 0, 0, 0.2 );
+}
+
+.wp-full-overlay-main {
+	left: 0;
+	right: 300px;
+}
+
+.wp-full-overlay.collapsed .wp-full-overlay-main {
+	left: auto;
+	right: 0;
+}
+
+.wp-full-overlay-sidebar div.wp-full-overlay-header,
+.wp-full-overlay-sidebar div.wp-full-overlay-footer {
+	left: auto;
+	right: 0;
+}
+
+.wp-full-overlay-sidebar div.wp-full-overlay-header {
+	box-shadow:
+		inset 11px 0 8px -8px rgba( 0, 0, 0, 0.1 ),
+		inset 0 -1px 0 0px #dfdfdf;
+}
+
+.wp-full-overlay-sidebar div.wp-full-overlay-footer {
+	box-shadow:
+		inset 11px 0 8px -8px rgba( 0, 0, 0, 0.1 ),
+		inset 0 1px 0 0px #fff;
+}
+
+/* Return and close buttons. */
+.wp-full-overlay .close-full-overlay {
+	left: auto;
+	right: 20px;
+}
+
+/* Collapse Button */
+.wp-full-overlay .collapse-sidebar {
+	left: auto;
+	right: 265px;
+}
+
+.wp-full-overlay.collapsed .collapse-sidebar {
+	left: auto;
+	right: 315px;
+}
+
+.wp-full-overlay .collapse-sidebar-arrow {
+	margin-left: 9;
+	margin-right: 2px;
+	background: transparent url('../../wp-admin/images/arrows.png') no-repeat 0 -108px;
+}
+
+.wp-full-overlay.collapsed .collapse-sidebar-arrow {
+	background-position: 0 -72px;
+}
+
+.wp-full-overlay .collapse-sidebar-label {
+	text-align: left;
+	position: absolute;
+	right: auto;
+	left: 100%;
+	margin-right: 0;
+	margin-left: 10px;
+}
+
+.wp-full-overlay.collapsed .collapse-sidebar-label {
+	display: none;
+}
+
 
 /* MERGED */
 
diff --git a/wp-admin/css/wp-admin.dev.css b/wp-admin/css/wp-admin.dev.css
index f3e0e1819..f3154b690 100644
--- a/wp-admin/css/wp-admin.dev.css
+++ b/wp-admin/css/wp-admin.dev.css
@@ -5169,6 +5169,7 @@ body.full-overlay-active {
 	top: 0;
 	bottom: 0;
 }
+
 .wp-full-overlay.collapsed .wp-full-overlay-main {
 	left: 0;
 }
@@ -5228,10 +5229,12 @@ body.full-overlay-active {
 	padding: 0;
 	border-radius: 50%;
 }
+
 .wp-full-overlay.collapsed .collapse-sidebar {
 	position: absolute;
 	left: 315px;
 }
+
 .wp-full-overlay .collapse-sidebar-arrow {
 	margin-top: 2px;
 	margin-left: 2px;
@@ -5240,6 +5243,7 @@ body.full-overlay-active {
 	height: 15px;
 	background: transparent url('../../wp-admin/images/arrows.png') no-repeat 0 -72px;
 }
+
 .wp-full-overlay.collapsed .collapse-sidebar-arrow {
 	background-position: 0 -108px;
 }
@@ -5252,9 +5256,11 @@ body.full-overlay-active {
 	line-height: 20px;
 	margin-right: 10px;
 }
+
 .wp-full-overlay.collapsed .collapse-sidebar-label {
 	display: none;
 }
+
 .wp-full-overlay .collapse-sidebar:hover .collapse-sidebar-label {
 	color: #999;
 }
diff --git a/wp-includes/css/customize-controls-rtl.css b/wp-includes/css/customize-controls-rtl.css
new file mode 100644
index 000000000..e69de29bb
diff --git a/wp-includes/css/customize-controls-rtl.dev.css b/wp-includes/css/customize-controls-rtl.dev.css
new file mode 100644
index 000000000..acb38732d
--- /dev/null
+++ b/wp-includes/css/customize-controls-rtl.dev.css
@@ -0,0 +1,83 @@
+.control-section .customize-section-title:hover {
+	box-shadow: inset 11px 0 8px -8px rgba( 0, 0, 0, 0.1 );
+}
+
+.customize-section-title:after {
+	right: auto;
+	left: 20px;
+}
+
+.customize-control {
+	float: right;
+}
+
+.customize-control-title {
+	clear: rigt;
+	float: right;
+	margin-right: 0;
+	margin-left: 10px;
+}
+
+.customize-control-text input,
+.customize-control-select select,
+.customize-control-checkbox input,
+.customize-control-color .color-picker,
+.customize-control-upload div {
+	float: right;
+	clear: left;
+}
+
+.customize-control-radio label {
+	float: right;
+	clear: both;
+}
+
+.customize-control-radio input {
+	margin-right: 0;
+	margin-left: 5px;
+}
+
+#customize-preview {
+	left: 0;
+	right: 300px;
+}
+
+/*
+ * Color Picker
+ */
+.customize-section .color-picker-hex span {
+	float: right;
+	margin: 1px 0 0 -2px;
+	padding: 3px 8px 3px 0;
+	text-align: left;
+}
+
+/*
+ * Image Picker
+ */
+.customize-section .customize-image-picker {
+	float: right;
+}
+
+.customize-section .customize-image-picker .thumbnail {
+	float: right;
+	clear: right;
+	margin-right: 0;
+	margin-left: 20px;
+}
+
+.customize-section .customize-image-picker .actions {
+	float: right;
+}
+
+.customize-section .customize-image-picker .library ul {
+	float: right;
+}
+
+.customize-section .customize-image-picker .library li {
+	float: right;
+}
+
+.customize-section .customize-image-picker .library div {
+	float: right;
+}
diff --git a/wp-includes/css/customize-controls.dev.css b/wp-includes/css/customize-controls.dev.css
index 081a25091..e914d8ca5 100644
--- a/wp-includes/css/customize-controls.dev.css
+++ b/wp-includes/css/customize-controls.dev.css
@@ -136,6 +136,7 @@ body {
 	margin-right: 10px;
 	line-height: 28px;
 }
+
 .customize-control-text input,
 .customize-control-select select,
 .customize-control-checkbox input,
@@ -176,6 +177,7 @@ body {
 	clear: both;
 	line-height: 20px;
 }
+
 .customize-control-radio input {
 	margin-right: 5px;
 }
@@ -193,63 +195,6 @@ body {
 	height: 100%;
 }
 
-.customize-loader {
-	background: transparent;
-	border: 4px solid #666;
-	border-radius: 50%;
-	display: block;
-	margin: 10px auto;
-	text-indent: -9999px;
-
-	height: 12px;
-	width: 12px;
-
-	/* Animation */
-	-webkit-animation: customize-loader 1s infinite ease-out;
-	-moz-animation: customize-loader 1s infinite ease-out;
-	animation: customize-loader 1s infinite ease-out;
-}
-@-moz-keyframes customize-loader {
-	0% {
-		opacity: 0;
-		-moz-transform: scale(0.7);
-	}
-	40% {
-		opacity: 1;
-	}
-	100% {
-		opacity: 0;
-		-moz-transform: scale(1);
-	}
-}
-@-webkit-keyframes customize-loader {
-	0% {
-		opacity: 0;
-		-webkit-transform: scale(0.7);
-	}
-	40% {
-		opacity: 1;
-	}
-	100% {
-		opacity: 0;
-		-webkit-transform: scale(1);
-	}
-}
-@keyframes customize-loader {
-	0% {
-		opacity: 0;
-		transform: scale(0.7);
-	}
-	40% {
-		opacity: 1;
-	}
-	100% {
-		opacity: 0;
-		transform: scale(1);
-	}
-}
-
-
 /*
  * Style for custom settings
  */
@@ -260,7 +205,6 @@ body {
 /*
  * Color Picker
  */
-
 .customize-section .color-picker a {
 	display: block;
 	height: 20px;
@@ -276,7 +220,6 @@ body {
 	display: none;
 }
 
-
 .customize-section .color-picker .farbtastic-placeholder {
 	height: 195px;
 	width: 195px;
@@ -287,7 +230,6 @@ body {
 	border-radius: 50%;
 }
 
-
 .customize-section .color-picker-hex {
 	background-color: #fff;
 	border: 1px solid #dfdfdf;
@@ -324,6 +266,7 @@ body {
 .customize-section .customize-image-picker {
 	float: left;
 }
+
 .customize-section .customize-image-picker .thumbnail {
 	float: left;
 	clear: left;
@@ -331,22 +274,27 @@ body {
 	margin-right: 20px;
 	min-height: 1em;
 }
+
 .customize-section .customize-image-picker .thumbnail img {
 	max-width: 98px;
 	max-height: 98px;
 	border: 1px solid #ccc;
 }
+
 .customize-section .customize-image-picker .actions {
 	width: 140px;
 	float: left;
 }
+
 .customize-section .customize-image-picker .actions a {
 	display: block;
 }
+
 .customize-section .customize-image-picker .library {
 	display: none;
 /*	float: left;*/
 }
+
 /*.customize-section .customize-image-picker .library label {
 	display: block;
 	position: relative;
@@ -363,12 +311,14 @@ body {
 /*.customize-section .customize-image-picker .library .wp-tab-panel {
 	padding: 10px 10px 5px 8px;
 }*/
+
 .customize-section .customize-image-picker .library ul {
 	border-bottom: 1px solid #dfdfdf;
 	float: left;
 	width: 100%;
 	margin: 5px 0;
 }
+
 .customize-section .customize-image-picker .library li {
 	color: #999;
 	float: left;
@@ -378,6 +328,7 @@ body {
 	border-color: transparent;
 	border-width: 1px 1px 0 1px;
 }
+
 .customize-section .customize-image-picker .library li.library-selected {
 	color: #777;
 	border-color: #dfdfdf;
@@ -385,10 +336,12 @@ body {
 	margin-bottom: -1px;
 	padding-bottom: 5px;
 }
+
 .customize-section .customize-image-picker .library div {
 	width: 100%;
 	float: left;
 }
+
 .customize-section .customize-image-picker .library a {
 	display: block;
 	max-width: 220px;
@@ -398,14 +351,17 @@ body {
 	background: #fff;
 	border: 1px solid #dfdfdf;
 }
+
 .customize-section .customize-image-picker .library a:hover {
 	border-color: #21759b;
 }
+
 .customize-section .customize-image-picker .library img {
 	display: block;
 	max-width: 220px;
 	max-height: 80px;
 }
+
 .customize-section .customize-image-picker .library-content {
 	display: none;
-}
\ No newline at end of file
+}
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 2811e3521..d5b293075 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -454,7 +454,7 @@ function wp_default_styles( &$styles ) {
 
 	$suffix = defined('SCRIPT_DEBUG') && SCRIPT_DEBUG ? '.dev' : '';
 
-	$rtl_styles = array( 'wp-admin', 'ie', 'media', 'admin-bar', 'wplink' );
+	$rtl_styles = array( 'wp-admin', 'ie', 'media', 'admin-bar', 'wplink', 'customize-controls' );
 	// Any rtl stylesheets that don't have a .dev version for ltr
 	$no_suffix = array( 'farbtastic' );