diff --git a/src/renderers/dom/client/ReactInputSelection.js b/src/renderers/dom/client/ReactInputSelection.js
index dcf8425197..c625e57f25 100644
--- a/src/renderers/dom/client/ReactInputSelection.js
+++ b/src/renderers/dom/client/ReactInputSelection.js
@@ -30,9 +30,10 @@ function isInDocument(node) {
 var ReactInputSelection = {
 
   hasSelectionCapabilities: function(elem) {
-    return elem && (
-      (elem.nodeName === 'INPUT' && elem.type === 'text') ||
-      elem.nodeName === 'TEXTAREA' ||
+    var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();
+    return nodeName && (
+      (nodeName === 'input' && elem.type === 'text') ||
+      nodeName === 'textarea' ||
       elem.contentEditable === 'true'
     );
   },
@@ -84,7 +85,8 @@ var ReactInputSelection = {
         start: input.selectionStart,
         end: input.selectionEnd
       };
-    } else if (document.selection && input.nodeName === 'INPUT') {
+    } else if (document.selection &&
+        (input.nodeName && input.nodeName.toLowerCase() === 'input')) {
       // IE8 input.
       var range = document.selection.createRange();
       // There can only be one selection per document in IE, so it must
@@ -119,7 +121,8 @@ var ReactInputSelection = {
     if ('selectionStart' in input) {
       input.selectionStart = start;
       input.selectionEnd = Math.min(end, input.value.length);
-    } else if (document.selection && input.nodeName === 'INPUT') {
+    } else if (document.selection &&
+        (input.nodeName && input.nodeName.toLowerCase() === 'input')) {
       var range = input.createTextRange();
       range.collapse(true);
       range.moveStart('character', start);
diff --git a/src/renderers/dom/client/ReactMount.js b/src/renderers/dom/client/ReactMount.js
index 090ae1624c..ab85a1432c 100644
--- a/src/renderers/dom/client/ReactMount.js
+++ b/src/renderers/dom/client/ReactMount.js
@@ -519,7 +519,7 @@ var ReactMount = {
     );
 
     warning(
-      container && container.tagName !== 'BODY',
+      container && container.tagName && container.tagName.toUpperCase() !== 'BODY',
       'render(): Rendering components directly into document.body is ' +
       'discouraged, since its children are often manipulated by third-party ' +
       'scripts and browser extensions. This may lead to subtle ' +
diff --git a/src/renderers/dom/client/eventPlugins/ChangeEventPlugin.js b/src/renderers/dom/client/eventPlugins/ChangeEventPlugin.js
index 52b1d00d73..e814346e8e 100644
--- a/src/renderers/dom/client/eventPlugins/ChangeEventPlugin.js
+++ b/src/renderers/dom/client/eventPlugins/ChangeEventPlugin.js
@@ -55,9 +55,10 @@ var activeElementValueProp = null;
  * SECTION: handle `change` event
  */
 function shouldUseChangeEvent(elem) {
+  var nodeName = elem.nodeName && elem.nodeName.toLowerCase();
   return (
-    elem.nodeName === 'SELECT' ||
-    (elem.nodeName === 'INPUT' && elem.type === 'file')
+    nodeName === 'select' ||
+    (nodeName === 'input' && elem.type === 'file')
   );
 }
 
@@ -289,7 +290,7 @@ function shouldUseClickEvent(elem) {
   // This approach works across all browsers, whereas `change` does not fire
   // until `blur` in IE8.
   return (
-    elem.nodeName === 'INPUT' &&
+    (elem.nodeName && elem.nodeName.toLowerCase() === 'input') &&
     (elem.type === 'checkbox' || elem.type === 'radio')
   );
 }
diff --git a/src/shared/utils/isTextInputElement.js b/src/shared/utils/isTextInputElement.js
index 649229e966..7148b81b48 100644
--- a/src/shared/utils/isTextInputElement.js
+++ b/src/shared/utils/isTextInputElement.js
@@ -33,9 +33,10 @@ var supportedInputTypes = {
 };
 
 function isTextInputElement(elem) {
-  return elem && (
-    (elem.nodeName === 'INPUT' && supportedInputTypes[elem.type]) ||
-    elem.nodeName === 'TEXTAREA'
+  var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();
+  return nodeName && (
+    (nodeName === 'input' && supportedInputTypes[elem.type]) ||
+    nodeName === 'textarea'
   );
 }