diff --git a/ns/lv2ext/external-ui.php b/ns/lv2ext/external-ui.php
index 47fea7f..4fd63a4 100644
--- a/ns/lv2ext/external-ui.php
+++ b/ns/lv2ext/external-ui.php
@@ -33,6 +33,7 @@ include_once("../../includes/header.php");
         <li><a href="http://drumkv1.sourceforge.net/" target="_blank">drumkv1</a></li>
         <li><a href="http://www.linuxdsp.co.uk/" target="_blank">linuxDSP</a></li>
         <li><a href="https://github.com/x42/meters.lv2" target="_blank">meters.lv2</a></li>
+        <li><a href="https://www.pianoteq.com/pianoteq4" target="_blank">Pianoteq</a></li>
         <li><a href="http://samplv1.sourceforge.net/" target="_blank">samplv1</a></li>
         <li><a href="http://synthv1.sourceforge.net/" target="_blank">synthv1</a></li>
     </ul>
@@ -43,6 +44,7 @@ include_once("../../includes/header.php");
     <ul>
         <li><a href="http://ardour.org" target="_blank">Ardour</a></li>
         <li><a href="<?php echo $ROOT; ?>/Applications:Carla" target="_blank">Carla</a></i></li>
+        <li><a href="http://drobilla.net/software/jalv/" target="_blank">Jalv</a> (using <a href="jalv_extui_svn5273b.diff" target="_blank">this patch</a>)</li>
         <li><a href="http://qtractor.sourceforge.net" target="_blank">Qtractor</a></li>
     </ul>
 </p>
diff --git a/ns/lv2ext/lv2_external_ui.h b/ns/lv2ext/lv2_external_ui.h
index e5c75bd..2c9e6ee 100755
--- a/ns/lv2ext/lv2_external_ui.h
+++ b/ns/lv2ext/lv2_external_ui.h
@@ -73,17 +73,19 @@ typedef struct _LV2_External_UI_Widget {
  */
 typedef struct _LV2_External_UI_Host {
   /**
-   * Callback that plugin UI will call
-   * when UI (GUI window) is closed by user.
+   * Callback that plugin UI will call when UI (GUI window) is closed by user.
    * This callback will be called during execution of LV2_External_UI_Widget::run()
    * (i.e. not from background thread).
    *
-   * After this callback is called, UI is defunct. Host must call
-   * LV2UI_Descriptor::cleanup(). If host wants to make the UI visible
-   * again UI must be reinstantiated.
+   * After this callback is called, UI is defunct. Host must call LV2UI_Descriptor::cleanup().
+   * If host wants to make the UI visible again, the UI must be reinstantiated.
+   *
+   * @note When using the depreated URI LV2_EXTERNAL_UI_DEPRECATED_URI,
+   *       some hosts will not call LV2UI_Descriptor::cleanup() as they should,
+   *       and may call show() again without re-initialization.
    *
    * @param controller Host context associated with plugin UI, as
-   * supplied to LV2UI_Descriptor::instantiate()
+   *                   supplied to LV2UI_Descriptor::instantiate().
    */
   void (*ui_closed)(LV2UI_Controller controller);