diff --git a/js/h5p.js b/js/h5p.js
index 20dbcf1..876c975 100644
--- a/js/h5p.js
+++ b/js/h5p.js
@@ -16,7 +16,18 @@ H5P.init = function () {
       H5P.fullScreenBrowserPrefix = '';
     }
     else if (document.documentElement.webkitRequestFullScreen && navigator.userAgent.indexOf('Android') === -1) { // Skip Android
-      H5P.fullScreenBrowserPrefix = 'webkit';
+      // Safari has stopped working as of v6.0.3.  (Specifying keyboard input
+      // makes webkitRequestFullScreen silently fail.)  The following code
+      // assumes that the Safari developers figure out how to properly handle
+      // their own extension before reaching version 6.0.10.  Until then, we
+      // treat Safari as an old IE.  (Please note: Just looking for Safari in
+      // the UA string will also match Chrome.)
+      if (navigator.userAgent.match(/Version\/6\.0\.[3-9].*Safari/)) {
+        H5P.fullScreenBrowserPrefix = undefined;
+      }
+      else {
+        H5P.fullScreenBrowserPrefix = 'webkit';
+      }
     }
     else if (document.documentElement.mozRequestFullScreen) {
       H5P.fullScreenBrowserPrefix = 'moz';
@@ -197,7 +208,7 @@ H5P.libraryFromString = function (library) {
 
 /**
  * Get the path to the library
- * 
+ *
  * @param {string} machineName The machine name of the library
  * @returns {string} The full path to the library
  */