diff --git a/lib/socket.js b/lib/socket.js
index 8491c678a..d1e2e4be6 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -179,7 +179,7 @@
     for (var i = 0, transport; transport = transports[i]; i++) {
       if (io.Transport[transport]
         && io.Transport[transport].check(this)
-        && (!this.isXDomain() || io.Transport[transport].xdomainCheck())) {
+        && (!this.isXDomain() || io.Transport[transport].xdomainCheck(this))) {
         return new io.Transport[transport](this, this.sessionid);
       }
     }
@@ -359,10 +359,17 @@
 
   Socket.prototype.disconnectSync = function () {
     // ensure disconnection
-    var xhr = io.util.request()
-      , uri = this.resource + '/' + io.protocol + '/' + this.sessionid;
-
+    var xhr = io.util.request();
+ 	var uri = [
+ 	     'http' + (this.options.secure ? 's' : '') + ':/'
+ 	     , this.options.host + ':' + this.options.port
+ 	     , this.options.resource
+ 	     , io.protocol
+ 	     , this.sessionid
+ 	     ].join('/'); 
+         
     xhr.open('GET', uri, true);
+    xhr.send(null); 
 
     // handle disconnection immediately
     this.onDisconnect('booted');
diff --git a/lib/transports/htmlfile.js b/lib/transports/htmlfile.js
index b3b5666b7..69684a2d4 100644
--- a/lib/transports/htmlfile.js
+++ b/lib/transports/htmlfile.js
@@ -134,11 +134,11 @@
    * @api public
    */
 
-  HTMLFile.check = function () {
+  HTMLFile.check = function (socket) {
     if (typeof window != "undefined" && 'ActiveXObject' in window){
       try {
         var a = new ActiveXObject('htmlfile');
-        return a && io.Transport.XHR.check();
+        return a && io.Transport.XHR.check(socket);
       } catch(e){}
     }
     return false;
diff --git a/lib/transports/xhr.js b/lib/transports/xhr.js
index 9a6eb3c19..dab91f55d 100644
--- a/lib/transports/xhr.js
+++ b/lib/transports/xhr.js
@@ -206,8 +206,8 @@
    * @api public
    */
 
-  XHR.xdomainCheck = function () {
-    return XHR.check(null, true);
+  XHR.xdomainCheck = function (socket) {
+    return XHR.check(socket, true);
   };
 
 })(