diff --git a/css/reveal.css b/css/reveal.css
index 92544142..548aecc2 100644
--- a/css/reveal.css
+++ b/css/reveal.css
@@ -560,8 +560,11 @@ body {
 	position: absolute;
 	width: 100%;
 	height: 100%;
-	left: 50%;
-	top: 50%;
+	top: 0;
+	right: 0;
+	bottom: 0;
+	left: 0;
+	margin: auto;
 
 	overflow: visible;
 	z-index: 1;
@@ -576,10 +579,10 @@ body {
 	    -ms-perspective: 600px;
 	        perspective: 600px;
 
-	-webkit-perspective-origin: 0px -100px;
-	   -moz-perspective-origin: 0px -100px;
-	    -ms-perspective-origin: 0px -100px;
-	        perspective-origin: 0px -100px;
+	-webkit-perspective-origin: 50% 40%;
+	   -moz-perspective-origin: 50% 40%;
+	    -ms-perspective-origin: 50% 40%;
+	        perspective-origin: 50% 40%;
 }
 
 .reveal .slides>section {
@@ -640,11 +643,6 @@ body {
 	        transition-duration: 1200ms;
 }
 
-.reveal .slides>section {
-	left: -50%;
-	top: -50%;
-}
-
 .reveal .slides>section.stack {
 	padding-top: 0;
 	padding-bottom: 0;
@@ -1133,10 +1131,10 @@ body {
  *********************************************/
 
 .reveal.overview .slides {
-	-webkit-perspective-origin: 0% 0%;
-	   -moz-perspective-origin: 0% 0%;
-	    -ms-perspective-origin: 0% 0%;
-	        perspective-origin: 0% 0%;
+	-webkit-perspective-origin: 50% 50%;
+	   -moz-perspective-origin: 50% 50%;
+	    -ms-perspective-origin: 50% 50%;
+	        perspective-origin: 50% 50%;
 
 	-webkit-perspective: 700px;
 	   -moz-perspective: 700px;
@@ -1146,7 +1144,6 @@ body {
 
 .reveal.overview .slides section {
 	height: 600px;
-	top: -300px !important;
 	overflow: hidden;
 	opacity: 1 !important;
 	visibility: visible !important;
diff --git a/css/reveal.min.css b/css/reveal.min.css
index 2fd1c3fb..1e574be9 100644
--- a/css/reveal.min.css
+++ b/css/reveal.min.css
@@ -4,4 +4,4 @@
  * MIT licensed
  *
  * Copyright (C) 2014 Hakim El Hattab, http://hakim.se
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.slide-background{-webkit-transition-duration:400ms;-moz-transition-duration:400ms;transition-duration:400ms}.reveal[data-transition-speed=slow]>.backgrounds .slide-background{-webkit-transition-duration:1200ms;-moz-transition-duration:1200ms;transition-duration:1200ms}.reveal.rtl .slides,.reveal.rtl .slides h1,.reveal.rtl .slides h2,.reveal.rtl .slides h3,.reveal.rtl .slides h4,.reveal.rtl .slides h5,.reveal.rtl .slides h6{direction:rtl;font-family:sans-serif}.reveal.rtl pre,.reveal.rtl code{direction:ltr}.reveal.rtl ol,.reveal.rtl ul{text-align:right}.reveal.rtl .progress span{float:right}.reveal.has-parallax-background .backgrounds{-webkit-transition:all .8s ease;-moz-transition:all .8s ease;transition:all .8s ease}.reveal.has-parallax-background[data-transition-speed=fast] .backgrounds{-webkit-transition-duration:400ms;-moz-transition-duration:400ms;transition-duration:400ms}.reveal.has-parallax-background[data-transition-speed=slow] .backgrounds{-webkit-transition-duration:1200ms;-moz-transition-duration:1200ms;transition-duration:1200ms}.reveal .preview-link-overlay{position:absolute;top:0;left:0;width:100%;height:100%;z-index:1000;background:rgba(0,0,0,.9);opacity:0;visibility:hidden;-webkit-transition:all .3s ease;-moz-transition:all .3s ease;transition:all .3s ease}.reveal .preview-link-overlay.visible{opacity:1;visibility:visible}.reveal .preview-link-overlay .spinner{position:absolute;display:block;top:50%;left:50%;width:32px;height:32px;margin:-16px 0 0 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50%;-moz-perspective-origin:50% 50%;-ms-perspective-origin:50% 50%;perspective-origin:50% 50%}.reveal .roll:hover{background:0;text-shadow:none}.reveal .roll span{display:block;position:relative;padding:0 2px;pointer-events:none;-webkit-transition:all 400ms ease;-moz-transition:all 400ms ease;transition:all 400ms ease;-webkit-transform-origin:50% 0;-moz-transform-origin:50% 0;-ms-transform-origin:50% 0;transform-origin:50% 0;-webkit-transform-style:preserve-3d;-moz-transform-style:preserve-3d;-ms-transform-style:preserve-3d;transform-style:preserve-3d;-webkit-backface-visibility:hidden;-moz-backface-visibility:hidden;backface-visibility:hidden}.reveal .roll:hover span{background:rgba(0,0,0,.5);-webkit-transform:translate3d(0px,0,-45px) rotateX(90deg);-moz-transform:translate3d(0px,0,-45px) rotateX(90deg);-ms-transform:translate3d(0px,0,-45px) rotateX(90deg);transform:translate3d(0px,0,-45px) rotateX(90deg)}.reveal .roll span:after{content:attr(data-title);display:block;position:absolute;left:0;top:0;padding:0 2px;-webkit-backface-visibility:hidden;-moz-backface-visibility:hidden;backface-visibility:hidden;-webkit-transform-origin:50% 0;-moz-transform-origin:50% 0;-ms-transform-origin:50% 0;transform-origin:50% 0;-webkit-transform:translate3d(0px,110%,0) rotateX(-90deg);-moz-transform:translate3d(0px,110%,0) rotateX(-90deg);-ms-transform:translate3d(0px,110%,0) rotateX(-90deg);transform:translate3d(0px,110%,0) rotateX(-90deg)}.reveal aside.notes{display:none}.zoomed .reveal *,.zoomed .reveal :before,.zoomed .reveal :after{-webkit-transform:none!important;-moz-transform:none!important;-ms-transform:none!important;transform:none!important;-webkit-backface-visibility:visible!important;-moz-backface-visibility:visible!important;-ms-backface-visibility:visible!important;backface-visibility:visible!important}.zoomed .reveal .progress,.zoomed .reveal .controls{opacity:0}.zoomed .reveal .roll span{background:0}.zoomed .reveal .roll span:after{visibility:hidden}
\ No newline at end of file
diff --git a/js/reveal.js b/js/reveal.js
index 41be56b9..b2294531 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -1118,7 +1118,11 @@ var Reveal = (function(){
 			}
 			// Apply scale transform as a fallback
 			else {
-				transformElement( dom.slides, 'translate(-50%, -50%) scale('+ scale +') translate(50%, 50%)' );
+				dom.slides.style.left = '50%';
+				dom.slides.style.top = '50%';
+				dom.slides.style.bottom = 'auto';
+				dom.slides.style.right = 'auto';
+				transformElement( dom.slides, 'translate(-50%, -50%) scale('+ scale +')' );
 			}
 
 			// Select all slides, vertical and horizontal
@@ -1139,7 +1143,7 @@ var Reveal = (function(){
 						slide.style.top = 0;
 					}
 					else {
-						slide.style.top = Math.max( - ( getAbsoluteHeight( slide ) / 2 ) - slidePadding, -slideHeight / 2 ) + 'px';
+						slide.style.top = Math.max( ( ( slideHeight - getAbsoluteHeight( slide ) ) / 2 ) - slidePadding, 0 ) + 'px';
 					}
 				}
 				else {
diff --git a/js/reveal.min.js b/js/reveal.min.js
index 27078e2d..89ea6047 100644
--- a/js/reveal.min.js
+++ b/js/reveal.min.js
@@ -1,9 +1,9 @@
 /*!
- * reveal.js 2.7.0-dev (2014-04-01, 09:10)
+ * reveal.js 2.7.0-dev (2014-04-03, 11:56)
  * http://lab.hakim.se/reveal-js
  * MIT licensed
  *
  * Copyright (C) 2014 Hakim El Hattab, http://hakim.se
  */
-var Reveal=function(){"use strict";function a(a){if(b(),!mc.transforms2d&&!mc.transforms3d)return document.body.setAttribute("class","no-transforms"),void 0;window.addEventListener("load",C,!1);var d=Reveal.getQueryHash();"undefined"!=typeof d.dependencies&&delete d.dependencies,l(hc,a),l(hc,d),t(),c()}function b(){mc.transforms3d="WebkitPerspective"in document.body.style||"MozPerspective"in document.body.style||"msPerspective"in document.body.style||"OPerspective"in document.body.style||"perspective"in document.body.style,mc.transforms2d="WebkitTransform"in document.body.style||"MozTransform"in document.body.style||"msTransform"in document.body.style||"OTransform"in document.body.style||"transform"in document.body.style,mc.requestAnimationFrameMethod=window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame,mc.requestAnimationFrame="function"==typeof 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