diff --git a/js/reveal.js b/js/reveal.js
index 7657ec7..feb2a10 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -1587,13 +1587,14 @@ var Reveal = (function(){
 		// an array
 		var horizontalSlides = toArray( document.querySelectorAll( HORIZONTAL_SLIDES_SELECTOR ) ),
 			horizontalSlidesLength = horizontalSlides.length,
-			distance;
+			distanceX,
+			distanceY;
 
 		if( horizontalSlidesLength ) {
 
 			// The number of steps away from the present slide that will
 			// be visible
-			var viewDistance = isOverview() ? 20 : config.viewDistance;
+			var viewDistance = isOverview() ? 10 : config.viewDistance;
 
 			// Limit view distance on weaker devices
 			if( isMobileDevice ) {
@@ -1606,30 +1607,29 @@ var Reveal = (function(){
 				var verticalSlides = toArray( horizontalSlide.querySelectorAll( 'section' ) ),
 					verticalSlidesLength = verticalSlides.length;
 
+				// Loops so that it measures 1 between the first and last slides
+				distanceX = Math.abs( ( indexh - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;
+
 				if( verticalSlidesLength ) {
 
 					// Always show the vertical stack itself, even if its child
 					// slides are invisible
 					horizontalSlide.style.display = 'block';
 
+					var oy = getPreviousVerticalIndex( horizontalSlide );
+
 					for( var y = 0; y < verticalSlidesLength; y++ ) {
 						var verticalSlide = verticalSlides[y];
 
-						var dx = x - indexh,
-							dy = y - indexv;
+						distanceY = x === indexh ? Math.abs( indexv - y ) : Math.abs( y - oy );
 
-						distance = Math.sqrt( dx*dx + dy*dy );
-
-						verticalSlide.style.display = distance > viewDistance ? 'none' : 'block';
+						verticalSlide.style.display = ( distanceX + distanceY ) > viewDistance ? 'none' : 'block';
 					}
 
 				}
 				else {
 
-					// Loops so that it measures 1 between the first and last slides
-					distance = Math.abs( ( indexh - x ) % ( horizontalSlidesLength - viewDistance ) ) || 0;
-
-					horizontalSlide.style.display = distance > viewDistance ? 'none' : 'block';
+					horizontalSlide.style.display = distanceX > viewDistance ? 'none' : 'block';
 
 				}
 			}
diff --git a/js/reveal.min.js b/js/reveal.min.js
index bc1a2d6..1e0cbcb 100644
--- a/js/reveal.min.js
+++ b/js/reveal.min.js
@@ -1,8 +1,8 @@
 /*!
- * reveal.js 2.5.0 (2013-08-11, 13:43)
+ * reveal.js 2.5.0 (2013-08-11, 16:27)
  * http://lab.hakim.se/reveal-js
  * MIT licensed
  *
  * Copyright (C) 2013 Hakim El Hattab, http://hakim.se
  */
-var Reveal=function(){"use strict";function e(e){return t(),Dt||Pt?(window.addEventListener("load",S,!1),d(Yt,e),o(),a(),void 0):(document.body.setAttribute("class","no-transforms"),void 0)}function t(){Pt="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,Dt="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,Nt=navigator.userAgent.match(/(iphone|ipod|android)/gi)}function n(){if(Wt.theme=document.querySelector("#theme"),Wt.wrapper=document.querySelector(".reveal"),Wt.slides=document.querySelector(".reveal .slides"),document.querySelector(".reveal .backgrounds")||(Wt.background=document.createElement("div"),Wt.background.classList.add("backgrounds"),Wt.wrapper.appendChild(Wt.background)),!Wt.wrapper.querySelector(".progress")){var e=document.createElement("div");e.classList.add("progress"),e.innerHTML="<span></span>",Wt.wrapper.appendChild(e)}if(!Wt.wrapper.querySelector(".controls")){var t=document.createElement("aside");t.classList.add("controls"),t.innerHTML='<div class="navigate-left"></div><div class="navigate-right"></div><div class="navigate-up"></div><div class="navigate-down"></div>',Wt.wrapper.appendChild(t)}if(!Wt.wrapper.querySelector(".state-background")){var n=document.createElement("div");n.classList.add("state-background"),Wt.wrapper.appendChild(n)}if(!Wt.wrapper.querySelector(".pause-overlay")){var r=document.createElement("div");r.classList.add("pause-overlay"),Wt.wrapper.appendChild(r)}Wt.progress=document.querySelector(".reveal .progress"),Wt.progressbar=document.querySelector(".reveal .progress span"),Yt.controls&&(Wt.controls=document.querySelector(".reveal .controls"),Wt.controlsLeft=u(document.querySelectorAll(".navigate-left")),Wt.controlsRight=u(document.querySelectorAll(".navigate-right")),Wt.controlsUp=u(document.querySelectorAll(".navigate-up")),Wt.controlsDown=u(document.querySelectorAll(".navigate-down")),Wt.controlsPrev=u(document.querySelectorAll(".navigate-prev")),Wt.controlsNext=u(document.querySelectorAll(".navigate-next")))}function r(){function e(e,t){var n={background:e.getAttribute("data-background"),backgroundSize:e.getAttribute("data-background-size"),backgroundImage:e.getAttribute("data-background-image"),backgroundColor:e.getAttribute("data-background-color"),backgroundRepeat:e.getAttribute("data-background-repeat"),backgroundPosition:e.getAttribute("data-background-position"),backgroundTransition:e.getAttribute("data-background-transition")},r=document.createElement("div");return r.className="slide-background",n.background&&(/^(http|file|\/\/)/gi.test(n.background)||/\.(png|jpg|jpeg|gif|bmp)$/gi.test(n.background)?r.style.backgroundImage="url("+n.background+")":r.style.background=n.background),n.backgroundSize&&(r.style.backgroundSize=n.backgroundSize),n.backgroundImage&&(r.style.backgroundImage='url("'+n.backgroundImage+'")'),n.backgroundColor&&(r.style.backgroundColor=n.backgroundColor),n.backgroundRepeat&&(r.style.backgroundRepeat=n.backgroundRepeat),n.backgroundPosition&&(r.style.backgroundPosition=n.backgroundPosition),n.backgroundTransition&&r.setAttribute("data-background-transition",n.backgroundTransition),t.appendChild(r),r}p()&&document.body.classList.add("print-pdf"),Wt.background.innerHTML="",Wt.background.classList.add("no-transition"),u(document.querySelectorAll(Rt)).forEach(function(t){var n;n=p()?e(t,t):e(t,Wt.background),u(t.querySelectorAll("section")).forEach(function(t){p()?e(t,t):e(t,n)})})}function 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t=Wt.theme.getAttribute("href"),n=/[^\/]*?(?=\.css)/,r=t.match(n)[0];Yt.theme!==r&&(t=t.replace(n,Yt.theme),Wt.theme.setAttribute("href",t))}z()}function 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