diff --git a/dlls/mshtml/nsembed.c b/dlls/mshtml/nsembed.c
index a64f6a55510..ddd030a8ee9 100644
--- a/dlls/mshtml/nsembed.c
+++ b/dlls/mshtml/nsembed.c
@@ -1115,6 +1115,7 @@ static nsresult NSAPI nsSupportsWeakReference_GetWeakReference(nsISupportsWeakRe
 
     TRACE("(%p)->(%p)\n", This, _retval);
 
+    nsIWeakReference_AddRef(NSWEAKREF(This));
     *_retval = NSWEAKREF(This);
     return NS_OK;
 }
@@ -1230,23 +1231,13 @@ NSContainer *NSContainer_Create(HTMLDocument *doc, NSContainer *parent)
 
 void NSContainer_Release(NSContainer *This)
 {
-    nsIBaseWindow *base_window;
-    nsresult nsres;
-
     TRACE("(%p)\n", This);
 
     ShowWindow(This->hwnd, SW_HIDE);
     SetParent(This->hwnd, NULL);
 
-    nsres = nsIWebBrowser_QueryInterface(This->webbrowser, &IID_nsIBaseWindow,
-                                         (void**)&base_window);
-    if(NS_SUCCEEDED(nsres)) {
-        nsIBaseWindow_SetVisibility(base_window, FALSE);
-        nsIBaseWindow_Destroy(base_window);
-        nsIBaseWindow_Release(base_window);
-    }else {
-        ERR("Could not get nsIBaseWindow interface: %08lx\n", nsres);
-    }
+    nsIBaseWindow_SetVisibility(This->window, FALSE);
+    nsIBaseWindow_Destroy(This->window);
 
     nsIWebBrowser_SetContainerWindow(This->webbrowser, NULL);
 
@@ -1259,6 +1250,9 @@ void NSContainer_Release(NSContainer *This)
     nsIBaseWindow_Release(This->window);
     This->window = NULL;
 
+    nsIWebBrowserFocus_Release(This->focus);
+    This->focus = NULL;
+
     if(This->stream) {
         nsIWebBrowserStream_Release(This->stream);
         This->stream = NULL;
diff --git a/dlls/mshtml/nsio.c b/dlls/mshtml/nsio.c
index 51b3160504d..8af0bf5cb7f 100644
--- a/dlls/mshtml/nsio.c
+++ b/dlls/mshtml/nsio.c
@@ -131,14 +131,13 @@ static BOOL handle_uri(NSContainer *container, nsChannel *channel, LPCWSTR uri)
 
         hres = IServiceProvider_QueryService(service_provider, &IID_IHlinkFrame,
                                              &IID_IHlinkFrame, (void**)&hlink_frame);
+        IServiceProvider_Release(service_provider);
         if(SUCCEEDED(hres)) {
             hlink_frame_navigate(doc, hlink_frame, uri, channel->post_data_stream, hlnf);
             IHlinkFrame_Release(hlink_frame);
 
             return FALSE;
         }
-
-        IServiceProvider_Release(service_provider);
     }
 
     return TRUE;
@@ -618,6 +617,7 @@ static nsresult NSAPI nsChannel_AsyncOpen(nsIHttpChannel *iface, nsIStreamListen
 
             nsres = nsIUploadChannel_SetUploadStream(upload_channel, This->post_data_stream,
                                                      &empty_string, -1);
+            nsIUploadChannel_Release(upload_channel);
             if(NS_FAILED(nsres))
                 WARN("SetUploadStream failed: %08lx\n", nsres);