diff --git a/docs/registry.go b/docs/registry.go
index ed1cd4056..622c09b3f 100644
--- a/docs/registry.go
+++ b/docs/registry.go
@@ -64,20 +64,19 @@ func (r *Registry) GetRemoteHistory(imgId, registry string, token []string) ([]s
 }
 
 // Check if an image exists in the Registry
-func (r *Registry) LookupRemoteImage(imgId, registry string, authConfig *auth.AuthConfig) bool {
+func (r *Registry) LookupRemoteImage(imgId, registry string, token []string) bool {
 	rt := &http.Transport{Proxy: http.ProxyFromEnvironment}
 
 	req, err := http.NewRequest("GET", registry+"/images/"+imgId+"/json", nil)
 	if err != nil {
 		return false
 	}
-	req.SetBasicAuth(authConfig.Username, authConfig.Password)
 	res, err := rt.RoundTrip(req)
 	if err != nil {
 		return false
 	}
 	res.Body.Close()
-	return res.StatusCode == 307
+	return res.StatusCode == 200
 }
 
 func (r *Registry) getImagesInRepository(repository string, authConfig *auth.AuthConfig) ([]map[string]string, error) {
@@ -163,7 +162,10 @@ func (r *Registry) GetRemoteTags(registries []string, repository string, token [
 		repository = "library/" + repository
 	}
 	for _, host := range registries {
-		endpoint := fmt.Sprintf("%s://%s/v1/repositories/%s/tags", UrlScheme(), host, repository)
+		endpoint := fmt.Sprintf("%s/v1/repositories/%s/tags", host, repository)
+		if !(strings.HasPrefix(endpoint, "http://") || strings.HasPrefix(endpoint, "https://")) {
+			endpoint = fmt.Sprintf("%s://%s", UrlScheme(), endpoint)
+		}
 		req, err := r.opaqueRequest("GET", endpoint, nil)
 		if err != nil {
 			return nil, err
@@ -173,6 +175,7 @@ func (r *Registry) GetRemoteTags(registries []string, repository string, token [
 		if err != nil {
 			return nil, err
 		}
+
 		utils.Debugf("Got status code %d from %s", res.StatusCode, endpoint)
 		defer res.Body.Close()
 
@@ -257,7 +260,7 @@ func (r *Registry) GetRepositoryData(remote string) (*RepositoryData, error) {
 
 // Push a local image to the registry
 func (r *Registry) PushImageJSONRegistry(imgData *ImgData, jsonRaw []byte, registry string, token []string) error {
-	registry = fmt.Sprintf("%s://%s/v1", UrlScheme(), registry)
+	registry = registry + "/v1"
 	// FIXME: try json with UTF8
 	req, err := http.NewRequest("PUT", registry+"/images/"+imgData.ID+"/json", strings.NewReader(string(jsonRaw)))
 	if err != nil {
@@ -293,7 +296,7 @@ func (r *Registry) PushImageJSONRegistry(imgData *ImgData, jsonRaw []byte, regis
 }
 
 func (r *Registry) PushImageLayerRegistry(imgId string, layer io.Reader, registry string, token []string) error {
-	registry = fmt.Sprintf("%s://%s/v1", UrlScheme(), registry)
+	registry = registry + "/v1"
 	req, err := http.NewRequest("PUT", registry+"/images/"+imgId+"/layer", layer)
 	if err != nil {
 		return err
@@ -331,7 +334,7 @@ func (r *Registry) opaqueRequest(method, urlStr string, body io.Reader) (*http.R
 func (r *Registry) PushRegistryTag(remote, revision, tag, registry string, token []string) error {
 	// "jsonify" the string
 	revision = "\"" + revision + "\""
-	registry = fmt.Sprintf("%s://%s/v1", UrlScheme(), registry)
+	registry = registry + "/v1"
 
 	req, err := r.opaqueRequest("PUT", registry+"/repositories/"+remote+"/tags/"+tag, strings.NewReader(revision))
 	if err != nil {