diff --git a/manual/server.rst b/manual/server.rst
index 9ad5eb0e29..af9cd262ff 100644
--- a/manual/server.rst
+++ b/manual/server.rst
@@ -153,7 +153,7 @@ The server interface
 The server interface is a simplified version of the main calibre interface,
 optimised for use with touch screens. The home screen shows you books
 you are currently reading as well as allowing to choose a calibre library you
-want to browse. The server in calibre 3 gives you access to all your libraries,
+want to browse. The server in calibre gives you access to all your libraries,
 not just a single one, as before.
 
 The book list
diff --git a/src/calibre/gui2/dialogs/device_category_editor.ui b/src/calibre/gui2/dialogs/device_category_editor.ui
index 379645bcc0..36435fdbd6 100644
--- a/src/calibre/gui2/dialogs/device_category_editor.ui
+++ b/src/calibre/gui2/dialogs/device_category_editor.ui
@@ -11,7 +11,7 @@
    </rect>
   </property>
   <property name="windowTitle">
-   <string>Category Editor</string>
+   <string>Category editor</string>
   </property>
   <property name="windowIcon">
    <iconset>
diff --git a/src/pyj/ajax.pyj b/src/pyj/ajax.pyj
index ec5c78cd1c..36a6a30b8c 100644
--- a/src/pyj/ajax.pyj
+++ b/src/pyj/ajax.pyj
@@ -77,7 +77,7 @@ def ajax(path, on_complete, on_progress=None, bypass_cache=True, method='GET', q
 
     def set_error(event, is_network_error):
         if is_network_error:
-            xhr.error_html = str.format(_('Failed to communicate with "{}", network error, is the server running and accessible?'), xhr.request_path)
+            xhr.error_html = str.format(_('Failed to communicate with "{}", network error. Is the server running and accessible?'), xhr.request_path)
         elif event is 'timeout':
             xhr.error_html = str.format(_('Failed to communicate with "{}", timed out after: {} seconds'), xhr.request_path, timeout)
         elif event is 'abort':