diff --git a/docs/mithril.render.md b/docs/mithril.render.md
index a391156c..0b4c6beb 100644
--- a/docs/mithril.render.md
+++ b/docs/mithril.render.md
@@ -3,7 +3,7 @@
 ---
 
 - [Usage](#usage)
-- [Subtree directives](#subtree directives)
+- [Subtree directives](#subtree-directives)
 - [Signature](#signature)
 
 ---
@@ -60,7 +60,7 @@ This mechanism is only intended to be used as a last resort optimization tool. I
 
 The example below shows how to use a SubtreeDirective object to create a static header that doesn't incur diff costs once it has been rendered. This means that we are avoiding the creation of the header subtree (and therefore skipping the diff algorithm) altogether, but it also means that dynamic variables will NOT be updated within the header.
 
-```
+```javascript
 var app = {}
 
 //here's an example plugin that determines whether data has changes.
@@ -78,7 +78,7 @@ app.bindOnce = (function() {
 
 //here's the view
 app.view = function() {
-	m(".layout", [
+	return m(".layout", [
 		app.bindOnce(function() {
 			//this only runs once in order to boost performance
 			//dynamic variables are not updated here
diff --git a/docs/mithril.request.md b/docs/mithril.request.md
index 9cb17890..e4b58c4c 100644
--- a/docs/mithril.request.md
+++ b/docs/mithril.request.md
@@ -10,7 +10,7 @@
 - [Casting the Response Data to a Class](#casting-the-response-data-to-a-class)
 - [Unwrapping Response Data](#unwrapping-response-data)
 - [Using Different Data Transfer Formats](#using-different-data-transfer-formats)
-- [File uploads with FormData](#file-uploads-with-form-data)
+- [File uploads with FormData](#file-uploads-with-formdata)
 - [Using variable data formats](#using-variable-data-formats)
 - [Extracting Metadata from the Response](#extracting-metadata-from-the-response)
 - [Custom request rejections](#custom-request-rejections)
diff --git a/docs/mithril.route.md b/docs/mithril.route.md
index 0511981a..af9f9390 100644
--- a/docs/mithril.route.md
+++ b/docs/mithril.route.md
@@ -8,7 +8,7 @@
 - [Running clean up code on route change](#running-clean-up-code-on-route-change)
 - [Redirecting](#redirecting)
 - [Reading the currently active route](#reading-the-currently-active-route)
-- [Mode abstraction](#mode abstraction)
+- [Mode abstraction](#mode-abstraction)
 
 ---
 
diff --git a/mithril.js b/mithril.js
index c3e42987..57c36f1a 100644
--- a/mithril.js
+++ b/mithril.js
@@ -138,13 +138,15 @@ var m = (function app(window, undefined) {
 					existing[cached[i].attrs.key] = {action: DELETION, index: i}
 				}
 			}
+			
+			data = data.filter(function(x) {return x != null})
+			
 			var guid = 0
 			for (var i = 0, len = data.length; i < len; i++) {
 				if (data[i] && data[i].attrs && data[i].attrs.key == null) data[i].attrs.key = "__mithril__" + guid++
 			}
+			
 			if (shouldMaintainIdentities) {
-				if (data.indexOf(null) > -1) data = data.filter(function(x) {return x != null})
-				
 				var keysDiffer = false
 				if (data.length != cached.length) keysDiffer = true
 				else for (var i = 0, cachedCell, dataCell; cachedCell = cached[i], dataCell = data[i]; i++) {
diff --git a/tests/mithril-tests.js b/tests/mithril-tests.js
index 00a34d77..f050bcbc 100644
--- a/tests/mithril-tests.js
+++ b/tests/mithril-tests.js
@@ -43,6 +43,32 @@ function testMithril(mock) {
 	test(function() {return m("div", [1], [2], [3]).children.length === 3})
 	
 	//m.module
+	test(function() {
+		var root = mock.document.createElement("div")
+		var whatever = 1
+		var app = {
+			view: function() {
+				return [
+					whatever % 2 ? m('span', '% 2') : undefined,
+					m('div', 'bugs'),
+					m('a'),
+				]
+			}
+		}
+		m.module(root, app)
+		mock.requestAnimationFrame.$resolve()
+		
+		whatever++
+		m.redraw()
+		mock.requestAnimationFrame.$resolve()
+		
+		whatever++
+		m.redraw()
+		mock.requestAnimationFrame.$resolve()
+		
+		return root.childNodes.length
+	})
+	
 	test(function() {
 		mock.requestAnimationFrame.$resolve()
 
@@ -983,7 +1009,7 @@ function testMithril(mock) {
 	test(function() {
 		var root = mock.document.createElement("div")
 		m.render(root, m("div", [undefined]))
-		return root.childNodes[0].childNodes[0].nodeValue === ""
+		return root.childNodes[0].childNodes.length === 0
 	})
 	test(function() {
 		var root = mock.document.createElement("div")
@@ -1006,19 +1032,19 @@ function testMithril(mock) {
 		var root = mock.document.createElement("div")
 		m.render(root, m("ul", [m("li")]))
 		m.render(root, m("ul", [m("li"), undefined]))
-		return root.childNodes[0].childNodes[1].nodeValue === ""
+		return root.childNodes[0].childNodes.length == 1
 	})
 	test(function() {
 		var root = mock.document.createElement("div")
 		m.render(root, m("ul", [m("li"), m("li")]))
 		m.render(root, m("ul", [m("li"), undefined]))
-		return root.childNodes[0].childNodes.length == 2 && root.childNodes[0].childNodes[1].nodeValue === ""
+		return root.childNodes[0].childNodes.length == 1
 	})
 	test(function() {
 		var root = mock.document.createElement("div")
 		m.render(root, m("ul", [m("li")]))
 		m.render(root, m("ul", [undefined]))
-		return root.childNodes[0].childNodes[0].nodeValue === ""
+		return root.childNodes[0].childNodes.length == 0
 	})
 	test(function() {
 		var root = mock.document.createElement("div")
@@ -1201,18 +1227,18 @@ function testMithril(mock) {
 		m.render(root, m("div", [m("button"), m("ul")]))
 		var valueBefore = root.childNodes[0].childNodes[0].nodeName
 		m.render(root, m("div", [undefined, m("ul")]))
-		var valueAfter = root.childNodes[0].childNodes[0].nodeValue
-		return valueBefore === "BUTTON" && valueAfter === ""
+		var valueAfter = root.childNodes[0].childNodes[0].nodeName
+		return valueBefore === "BUTTON" && valueAfter === "UL"
 	})
 	test(function() {
 		var root = mock.document.createElement("div")
 		m.render(root, m("div", [m("ul"), undefined]))
 		var valueBefore1 = root.childNodes[0].childNodes[0].nodeName
-		var valueBefore2 = root.childNodes[0].childNodes[1].nodeValue
+		var valueBefore2 = root.childNodes[0].childNodes.length
 		m.render(root, m("div", [undefined, m("ul")]))
-		var valueAfter1 = root.childNodes[0].childNodes[0].nodeValue
-		var valueAfter2 = root.childNodes[0].childNodes[1].nodeName
-		return valueBefore1 === "UL" && valueAfter1 === "" && valueBefore2 === "" && valueAfter2 === "UL"
+		var valueAfter1 = root.childNodes[0].childNodes[0].nodeName
+		var valueAfter2 = root.childNodes[0].childNodes.length
+		return valueBefore1 === "UL" && valueAfter1 === "UL" && valueBefore2 === 1 && valueAfter2 === 1
 	})
 	test(function() {
 		//https://github.com/lhorie/mithril.js/issues/79