Index: src/plugin/PluginWbPassThrough.cpp
===================================================================
--- a/src/plugin/PluginWbPassThrough.cpp
+++ b/src/plugin/PluginWbPassThrough.cpp
@@ -152,7 +152,15 @@
     LPOLESTR domainRetrieved = 0;
     if (resLen == 0 || wcscmp(bindToObject, L"FALSE") == 0)
     {   
-      HRESULT hr = pOIBindInfo->GetBindString(BINDSTRING_XDR_ORIGIN, &domainRetrieved, 1, &resLen);
+      HRESULT hr = S_OK;
+      if (CPluginClient::GetInstance()->GetIEVersion() > 8)
+      {
+        hr = pOIBindInfo->GetBindString(BINDSTRING_ROOTDOC_URL, &domainRetrieved, 1, &resLen);
+      }
+      else
+      {
+        hr = pOIBindInfo->GetBindString(BINDSTRING_XDR_ORIGIN, &domainRetrieved, 1, &resLen);
+      }
       
       if ((hr == S_OK) && domainRetrieved && (resLen > 0))
       {
@@ -207,10 +215,25 @@
     }
   }
 
-
+  // Request from unknown thread, so we don't know the tab
   if (tab == NULL)
   {
     contentType = GetContentType(mimeType, boundDomain, src);
+
+    if (CPluginClient::GetInstance()->GetIEVersion() > 8)
+    {
+      // Find tab based on document URL
+      tab = CPluginClass::GetTab(boundDomain.GetString());
+      if ((tab != 0) && (tab->IsFrameCached(src)))
+      {
+        contentType = CFilter::contentTypeSubdocument;
+        // add frame to a referrer chain
+        if (client->ShouldBlock(boundDomain, contentType, tab->GetDocumentUrl(), true))
+        {
+          isBlocked = true;
+        }
+      }
+    }
     if (client->ShouldBlock(src, contentType, boundDomain, true))
     {
       isBlocked = true;