diff --git a/vendor/assets/javascripts/medium-editor.js b/vendor/assets/javascripts/medium-editor.js
index 5255781..55685f9 100644
--- a/vendor/assets/javascripts/medium-editor.js
+++ b/vendor/assets/javascripts/medium-editor.js
@@ -176,7 +176,9 @@ if (!("classList" in document.createElement("_"))) {
     if (typeof module === 'object') {
         module.exports = factory;
     } else if (typeof define === 'function' && define.amd) {
-        define(factory);
+        define(function () {
+            return factory;
+        });
     } else {
         root.MediumEditor = factory;
     }
@@ -848,11 +850,7 @@ var DefaultButton,
         queryCommandState: function () {
             var queryState = null;
             if (this.options.useQueryState) {
-                try {
-                    queryState = this.base.options.ownerDocument.queryCommandState(this.getAction());
-                } catch (exc) {
-                    queryState = null;
-                }
+                queryState = this.base.queryCommandState(this.getAction());
             }
             return queryState;
         },
@@ -2377,6 +2375,28 @@ function MediumEditor(elements, options) {
             return this;
         },
 
+        // Wrapper around document.queryCommandState for checking whether an action has already
+        // been applied to the current selection
+        queryCommandState: function (action) {
+            var fullAction = /^full-(.+)$/gi,
+                match,
+                queryState = null;
+
+            // Actions starting with 'full-' need to be modified since this is a medium-editor concept
+            match = fullAction.exec(action);
+            if (match) {
+                action = match[1];
+            }
+
+            try {
+                queryState = this.options.ownerDocument.queryCommandState(action);
+            } catch (exc) {
+                queryState = null;
+            }
+
+            return queryState;
+        },
+
         execAction: function (action, opts) {
             /*jslint regexp: true*/
             var fullAction = /^full-(.+)$/gi,
@@ -2427,26 +2447,8 @@ function MediumEditor(elements, options) {
             return this.options.ownerDocument.execCommand(action, false, null);
         },
 
-        // TODO: move these two methods to selection.js
-        // http://stackoverflow.com/questions/15867542/range-object-get-selection-parent-node-chrome-vs-firefox
-        rangeSelectsSingleNode: function (range) {
-            var startNode = range.startContainer;
-            return startNode === range.endContainer &&
-                startNode.hasChildNodes() &&
-                range.endOffset === range.startOffset + 1;
-        },
-
         getSelectedParentElement: function () {
-            var selectedParentElement = null,
-                range = this.selectionRange;
-            if (this.rangeSelectsSingleNode(range) && range.startContainer.childNodes[range.startOffset].nodeType !== 3) {
-                selectedParentElement = range.startContainer.childNodes[range.startOffset];
-            } else if (range.startContainer.nodeType === 3) {
-                selectedParentElement = range.startContainer.parentNode;
-            } else {
-                selectedParentElement = range.startContainer;
-            }
-            return selectedParentElement;
+            return Selection.getSelectedParentElement();
         },
 
         execFormatBlock: function (el) {
diff --git a/vendor/assets/stylesheets/medium-editor/themes/default.css b/vendor/assets/stylesheets/medium-editor/themes/default.css
index 4a3feb2..264f7bf 100755
--- a/vendor/assets/stylesheets/medium-editor/themes/default.css
+++ b/vendor/assets/stylesheets/medium-editor/themes/default.css
@@ -10,7 +10,7 @@
   border: 1px solid #000;
   background-color: #242424;
   background: -webkit-linear-gradient(bottom, #242424, rgba(36, 36, 36, 0.75));
-  background: linear-gradient(bottom, #242424, rgba(36, 36, 36, 0.75));
+  background: linear-gradient(to bottom, #242424, rgba(36, 36, 36, 0.75));
   border-radius: 5px;
   box-shadow: 0 0 3px #000; }
   .medium-editor-toolbar li button {
@@ -23,7 +23,7 @@
     background-color: #242424;
     color: #fff;
     background: -webkit-linear-gradient(bottom, #242424, rgba(36, 36, 36, 0.89));
-    background: linear-gradient(bottom, #242424, rgba(36, 36, 36, 0.89));
+    background: linear-gradient(to bottom, #242424, rgba(36, 36, 36, 0.89));
     box-shadow: 0 2px 2px rgba(0, 0, 0, 0.3);
     -webkit-transition: background-color .2s ease-in;
             transition: background-color .2s ease-in; }
@@ -40,7 +40,7 @@
     background-color: #000;
     color: #fff;
     background: -webkit-linear-gradient(bottom, #242424, rgba(0, 0, 0, 0.89));
-    background: linear-gradient(bottom, #242424, rgba(0, 0, 0, 0.89)); }
+    background: linear-gradient(to bottom, #242424, rgba(0, 0, 0, 0.89)); }
 
 .medium-editor-toolbar-form {
   background: #242424;
diff --git a/vendor/assets/stylesheets/medium-editor/themes/mani.css b/vendor/assets/stylesheets/medium-editor/themes/mani.css
index acd3f2c..4c2e7ca 100644
--- a/vendor/assets/stylesheets/medium-editor/themes/mani.css
+++ b/vendor/assets/stylesheets/medium-editor/themes/mani.css
@@ -6,7 +6,7 @@
   background-color: #dee7f0;
   background-color: rgba(222, 231, 240, 0.95);
   background: -webkit-linear-gradient(bottom, #dee7f0, #ffffff);
-  background: linear-gradient(bottom, #dee7f0, #ffffff);
+  background: linear-gradient(to bottom, #dee7f0, #ffffff);
   border-radius: 2px;
   box-shadow: 0 2px 6px rgba(0, 0, 0, 0.45); }
   .medium-editor-toolbar li button {
@@ -33,7 +33,7 @@
     background-color: rgba(92, 144, 199, 0.45);
     color: #000;
     background: -webkit-linear-gradient(bottom, #dee7f0, rgba(0, 0, 0, 0.1));
-    background: linear-gradient(bottom, #dee7f0, rgba(0, 0, 0, 0.1)); }
+    background: linear-gradient(to bottom, #dee7f0, rgba(0, 0, 0, 0.1)); }
 
 .medium-editor-toolbar-form {
   background: #dee7f0;
diff --git a/vendor/assets/stylesheets/medium-editor/themes/roman.css b/vendor/assets/stylesheets/medium-editor/themes/roman.css
index 94a706c..68f07de 100644
--- a/vendor/assets/stylesheets/medium-editor/themes/roman.css
+++ b/vendor/assets/stylesheets/medium-editor/themes/roman.css
@@ -15,7 +15,7 @@
     color: #889aac;
     box-shadow: inset 0 0 3px #f8f8e6;
     background: -webkit-linear-gradient(top, #fff, rgba(0, 0, 0, 0.1));
-    background: linear-gradient(top, #fff, rgba(0, 0, 0, 0.1));
+    background: linear-gradient(to top, #fff, rgba(0, 0, 0, 0.1));
     text-shadow: 1px 4px 6px #def, 0 0 0 #000, 1px 4px 6px #def;
     -webkit-transition: background-color .2s ease-in;
             transition: background-color .2s ease-in; }
@@ -34,7 +34,7 @@
     color: #000;
     color: rgba(0, 0, 0, 0.8);
     background: -webkit-linear-gradient(bottom, #fff, rgba(0, 0, 0, 0.2));
-    background: linear-gradient(bottom, #fff, rgba(0, 0, 0, 0.2)); }
+    background: linear-gradient(to bottom, #fff, rgba(0, 0, 0, 0.2)); }
 
 .medium-editor-toolbar-form {
   background: #fff;