diff -r dfac630f82db -r 2d87a07fa3d0 src/js/libs/popcorn.mediafragment.js
--- a/src/js/libs/popcorn.mediafragment.js	Thu Nov 17 12:04:25 2011 +0100
+++ b/src/js/libs/popcorn.mediafragment.js	Thu Nov 17 12:12:01 2011 +0100
@@ -4,8 +4,8 @@
 
   /**
    * Mediafragment popcorn plug-in
-   * Adds (limited) support for mediafragment requests 
-   * to a popcorn video.  
+   * Adds (limited) support for mediafragment requests
+   * to a popcorn video.
    * @param {Object} options
    *
   **/
@@ -21,30 +21,34 @@
         options: {
         }
       },
-      
+
     _setup: function( options ) {
         var advanceTime = function() {
               var url = window.location.href;
-              
-              if ( url.split("#")[1] != null ) {
-                  pageoffset = url.split( "#" )[1];							
-                  
+
+              if ( url.split( "#" )[ 1 ] != null ) {
+                  pageoffset = url.split( "#" )[1];
+
                   if ( pageoffset.substring( 2 ) != null ) {
-                    var offsettime = pageoffset.substring( 2 );						
-                    this.currentTime(parseFloat(offsettime));
-                  }							
+                    var offsettime = pageoffset.substring( 2 );
+                    this.currentTime( parseFloat( offsettime ) );
+                  }
               }
         }
-        
+
         var updateTime = function() {
-            splitArr = window.location.href.split("#")			
-            history.replaceState({}, "", splitArr[0] + "#t=" + this.currentTime().toFixed(2));
+            var history = window.history;
+            if ( !history.pushState ) {
+              return false;
+            }
+            
+            splitArr = window.location.href.split( "#" )
+            history.replaceState( {}, "", splitArr[0] + "#t=" + this.currentTime().toFixed( 2 ) );
         };
-        
-        this.listen( 'loadedmetadata', advanceTime );        
-        this.listen("pause", updateTime);
-        this.listen("seeked", updateTime);
-        
+
+        this.listen( "loadedmetadata", advanceTime );
+        this.listen( "pause", updateTime );
+        this.listen( "seeked", updateTime );
     },
 
     _teardown: function( options ) {