diff --git a/h5p.classes.php b/h5p.classes.php
index 7d964ba..e77258c 100644
--- a/h5p.classes.php
+++ b/h5p.classes.php
@@ -1526,7 +1526,7 @@ class H5PCore {
 
   public static $coreApi = array(
     'majorVersion' => 1,
-    'minorVersion' => 3
+    'minorVersion' => 4
   );
   public static $styles = array(
     'styles/h5p.css',
@@ -1648,19 +1648,23 @@ class H5PCore {
 
     // Update content dependencies.
     $content['dependencies'] = $validator->getDependencies();
-    $this->h5pF->deleteLibraryUsage($content['id']);
-    $this->h5pF->saveLibraryUsage($content['id'], $content['dependencies']);
 
-    if ($this->exportEnabled) {
-      // Recreate export file
-      $exporter = new H5PExport($this->h5pF, $this);
-      $exporter->createExportFile($content);
+    // Sometimes the parameters are filtered before content has been created
+    if ($content['id']) {
+      $this->h5pF->deleteLibraryUsage($content['id']);
+      $this->h5pF->saveLibraryUsage($content['id'], $content['dependencies']);
 
-      // TODO: Should we rather create the file once first accessed, like imagecache?
+      if ($this->exportEnabled) {
+        // Recreate export file
+        $exporter = new H5PExport($this->h5pF, $this);
+        $exporter->createExportFile($content);
+
+        // TODO: Should we rather create the file once first accessed, like imagecache?
+      }
+
+      // Cache.
+      $this->h5pF->setFilteredParameters($content['id'], $params);
     }
-
-    // Cache.
-    $this->h5pF->setFilteredParameters($content['id'], $params);
     return $params;
   }
 
diff --git a/js/h5p.js b/js/h5p.js
index d53f8e2..fe257f2 100644
--- a/js/h5p.js
+++ b/js/h5p.js
@@ -1099,3 +1099,10 @@ if (H5P.jQuery) {
     }
   });
 }
+
+ /**
+  * Mimics how php's htmlspecialchars works (the way we use it)
+  */
+H5P.htmlSpecialChars = function(string) {
+  return string.toString().replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/'/g, '&#039;').replace(/"/g, '&quot;');
+};
\ No newline at end of file