diff --git a/h5p.classes.php b/h5p.classes.php
index 16ab951..8ff35f8 100644
--- a/h5p.classes.php
+++ b/h5p.classes.php
@@ -1578,16 +1578,19 @@ Class H5PExport {
    */
   private static function populateFileList($dir, &$files, $relative = '') {
     $strip = strlen($dir) + 1;
-    foreach (glob($dir . DIRECTORY_SEPARATOR . '*') as $file) {
-      $rel = $relative . substr($file, $strip);
-      if (is_dir($file)) {
-        self::populateFileList($file, $files, $rel . '/');
-      }
-      else {
-        $files[] = (object) array(
-          'absolutePath' => $file,
-          'relativePath' => $rel
-        );
+    $contents = glob($dir . DIRECTORY_SEPARATOR . '*');
+    if (!empty($contents)) {
+      foreach ($contents as $file) {
+        $rel = $relative . substr($file, $strip);
+        if (is_dir($file)) {
+          self::populateFileList($file, $files, $rel . '/');
+        }
+        else {
+          $files[] = (object) array(
+            'absolutePath' => $file,
+            'relativePath' => $rel
+          );
+        }
       }
     }
   }
diff --git a/js/h5p-resizer.js b/js/h5p-resizer.js
index ab35e19..228cc72 100644
--- a/js/h5p-resizer.js
+++ b/js/h5p-resizer.js
@@ -19,6 +19,7 @@
   actionHandlers.hello = function (iframe, data, respond) {
     // Make iframe responsive
     iframe.style.width = '100%';
+    iframe.contentDocument.body.style.height = 'auto';
 
     // Tell iframe that it needs to resize when our window resizes
     var resize = function (event) {
@@ -46,16 +47,6 @@
    * @param {Function} respond Send a response to the iframe
    */
   actionHandlers.prepareResize = function (iframe, data, respond) {
-    responseData = {};
-
-    // Create spaceholder and insert after iframe.
-    var spaceholder = document.createElement('div');
-    spaceholder.style.height = (iframe.clientHeight - 1) + 'px';
-    iframe.parentNode.insertBefore(spaceholder, iframe.nextSibling);
-
-    // Reset iframe height, in case content has shrinked.
-    iframe.style.height = '1px';
-
     respond('resizePrepared');
   };
 
@@ -68,14 +59,21 @@
    * @param {Function} respond Send a response to the iframe
    */
   actionHandlers.resize = function (iframe, data, respond) {
-    // Resize iframe so all content is visible.
-    iframe.style.height = data.height + 'px';
-    iframe.parentNode.removeChild(iframe.nextSibling);
+    if (iframe.clientHeight === iframe.contentDocument.body.scrollHeight &&
+        iframe.contentDocument.body.scrollHeight === iframe.contentWindow.document.body.clientHeight) {
+      return; // Do not resize unless page and scrolling differs
+    }
+
+    // Reset iframe height, in case content has shrinked.
+    iframe.style.height = iframe.contentWindow.document.body.clientHeight + 'px';
+
+    // Resize iframe so all content is visible. Use scrollHeight to make sure we get everything
+    iframe.style.height = iframe.contentDocument.body.scrollHeight + 'px';
   };
 
   /**
    * Keyup event handler. Exits full screen on escape.
-   * 
+   *
    * @param {Event} event
    */
   var escape = function (event) {
diff --git a/js/h5p-x-api-event.js b/js/h5p-x-api-event.js
index 98b287a..c5ce2e3 100644
--- a/js/h5p-x-api-event.js
+++ b/js/h5p-x-api-event.js
@@ -18,18 +18,40 @@ H5P.XAPIEvent.prototype.constructor = H5P.XAPIEvent;
  *
  * @param {number} score
  * @param {number} maxScore
+ * @param {object} instance
+ * @param {boolean} completion
+ * @param {boolean} success
  */
-H5P.XAPIEvent.prototype.setScoredResult = function (score, maxScore, instance) {
-  this.data.statement.result = {
-    'score': {
-      'min': 0,
-      'max': maxScore,
-      'raw': score
+H5P.XAPIEvent.prototype.setScoredResult = function (score, maxScore, instance, completion, success) {
+  this.data.statement.result = {};
+  
+  if (typeof score !== 'undefined') {
+    if (typeof maxScore === 'undefined') {
+      this.data.statement.result.score = {'raw': score};
+    }
+    else {
+      this.data.statement.result.score = {
+        'min': 0,
+        'max': maxScore,
+        'raw': score
+      };
+      if (maxScore > 0) {
+        this.data.statement.result.score.scaled = Math.round(score / maxScore * 10000) / 10000;
+      }
     }
-  };
-  if (maxScore > 0) {
-    this.data.statement.result.score.scaled = Math.round(score / maxScore * 10000) / 10000;
   }
+  
+  if (typeof completion === 'undefined') {
+    this.data.statement.result.completion = (this.getVerb() === 'completed' || this.getVerb() === 'answered');
+  }
+  else {
+    this.data.statement.result.completion = completion;
+  }
+  
+  if (typeof success !== 'undefined') {
+    this.data.statement.result.success = success;
+  }
+  
   if (instance && instance.activityStartTime) {
     var duration = Math.round((Date.now() - instance.activityStartTime ) / 10) / 100;
     // xAPI spec allows a precision of 0.01 seconds
diff --git a/js/h5p-x-api.js b/js/h5p-x-api.js
index e287c1a..08908bf 100644
--- a/js/h5p-x-api.js
+++ b/js/h5p-x-api.js
@@ -65,9 +65,11 @@ H5P.EventDispatcher.prototype.createXAPIEventTemplate = function (verb, extra) {
  *   Will be set as the 'raw' value of the score object
  * @param {number} maxScore
  *   will be set as the "max" value of the score object
+ * @param {boolean} success
+ *   will be set as the "success" value of the result object
  */
-H5P.EventDispatcher.prototype.triggerXAPICompleted = function (score, maxScore) {
-  this.triggerXAPIScored(score, maxScore, 'completed');
+H5P.EventDispatcher.prototype.triggerXAPICompleted = function (score, maxScore, success) {
+  this.triggerXAPIScored(score, maxScore, 'completed', true, success);
 };
 
 /**
@@ -79,10 +81,14 @@ H5P.EventDispatcher.prototype.triggerXAPICompleted = function (score, maxScore)
  *   Will be set as the "max" value of the score object
  * @param {string} verb
  *   Short form of adl verb
+ * @param {boolean} completion
+ *   Is this a statement from a completed activity?
+ * @param {boolean} success
+ *   Is this a statement from an activity that was done successfully?
  */
-H5P.EventDispatcher.prototype.triggerXAPIScored = function (score, maxScore, verb) {
+H5P.EventDispatcher.prototype.triggerXAPIScored = function (score, maxScore, verb, completion, success) {
   var event = this.createXAPIEventTemplate(verb);
-  event.setScoredResult(score, maxScore, this);
+  event.setScoredResult(score, maxScore, this, completion, success);
   this.trigger(event);
 };
 
@@ -96,7 +102,7 @@ H5P.EventDispatcher.prototype.setActivityStarted = function() {
  * @param {H5P.XAPIEvent} event
  */
 H5P.xAPICompletedListener = function (event) {
-  if (event.getVerb() === 'completed' && !event.getVerifiedStatementValue(['context', 'contextActivities', 'parent'])) {
+  if ((event.getVerb() === 'completed' || event.getVerb() === 'answered') && !event.getVerifiedStatementValue(['context', 'contextActivities', 'parent'])) {
     var score = event.getScore();
     var maxScore = event.getMaxScore();
     var contentId = event.getVerifiedStatementValue(['object', 'definition', 'extensions', 'http://h5p.org/x-api/h5p-local-content-id']);
diff --git a/js/h5p.js b/js/h5p.js
index a55a87c..504d8d0 100644
--- a/js/h5p.js
+++ b/js/h5p.js
@@ -539,7 +539,13 @@ H5P.fullScreen = function ($element, instance, exitCallback, body) {
 
     before('h5p-semi-fullscreen');
     var $disable = H5P.jQuery('<div role="button" tabindex="1" class="h5p-disable-fullscreen" title="' + H5P.t('disableFullscreen') + '"></div>').appendTo($container.find('.h5p-content-controls'));
-    var keyup, disableSemiFullscreen = function () {
+    var keyup, disableSemiFullscreen = H5P.exitFullScreen = function () {
+      if (lastViewport) {
+        metaTags[i].content = lastViewport;
+      }
+      else {
+        head.removeChild(metaTag);
+      }
       $disable.remove();
       $body.unbind('keyup', keyup);
       done('h5p-semi-fullscreen');
@@ -551,6 +557,27 @@ H5P.fullScreen = function ($element, instance, exitCallback, body) {
     };
     $disable.click(disableSemiFullscreen);
     $body.keyup(keyup);
+
+    // Disable zoom
+    var lastViewport;
+    var metaTags = document.getElementsByTagName('meta');
+    for (var i = 0; i < metaTags.length; i++) {
+      if (metaTags[i].name === 'viewport') {
+        lastViewport = metaTags[i].content;
+        break;
+      }
+    }
+    if (!lastViewport) {
+      // Create tag
+      metaTags[i] = document.createElement('meta');
+      metaTags[i].name = 'viewport';
+    }
+    metaTags[i].content = 'width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0';
+    if (!lastViewport) {
+      var head = document.getElementsByTagName('head')[0];
+      head.appendChild(metaTag);
+    }
+
     entered();
   }
   else {
diff --git a/styles/h5p.css b/styles/h5p.css
index 3fca24e..4586952 100644
--- a/styles/h5p.css
+++ b/styles/h5p.css
@@ -130,13 +130,15 @@ div.h5p-fullscreen {
 }
 
 .h5p-iframe-wrapper.h5p-semi-fullscreen {
-  width: 100%;
-  height: 100%;
+  width: auto;
+  height: auto;
   background: black;
   position: fixed;
   top: 0;
   left: 0;
-  z-index: 1000;
+  right: 0;
+  bottom: 0;
+  z-index: 100001;
 }
 .h5p-iframe-wrapper.h5p-semi-fullscreen .buttons {
   position: absolute;