diff --git a/src/calibre/gui2/viewer/web_view.py b/src/calibre/gui2/viewer/web_view.py
index c12085cf1a..dfd8df0885 100644
--- a/src/calibre/gui2/viewer/web_view.py
+++ b/src/calibre/gui2/viewer/web_view.py
@@ -325,7 +325,7 @@ class WebView(RestartingWebEngineView):
             self.pending_bridge_ready_actions[action] = args
 
     def show_preparing_message(self):
-        msg = _('Preparing book for reading, please wait…')
+        msg = _('Preparing book for first read, please wait…')
         self.execute_when_ready('show_preparing_message', msg)
 
     def set_session_data(self, key, val):
diff --git a/src/calibre/srv/render_book.py b/src/calibre/srv/render_book.py
index 1cb34c89c3..aa7be19568 100644
--- a/src/calibre/srv/render_book.py
+++ b/src/calibre/srv/render_book.py
@@ -443,7 +443,7 @@ def serialize_elem(elem, nsmap):
         ns, name = None, 'epub-' + name
     if nl == 'meta':
         return  # Filter out <meta> tags as they have unknown side-effects
-    if name.lower() in {'img', 'script', 'link', 'image', 'style'}:
+    if nl in {'img', 'script', 'link', 'image', 'style'}:
         name = nl
     ans = {'n':name}
     if elem.text: