diff --git a/docs/conf.py b/docs/conf.py
index 4aeb66d33..c999763a8 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -23,7 +23,6 @@ extlinks = {
 }
 
 # Options for HTML output
-html_theme = 'classic'
 htmlhelp_basename = 'beetsdoc'
 
 # Options for LaTeX output
diff --git a/docs/guides/main.rst b/docs/guides/main.rst
index c636dd390..9e4cd1bac 100644
--- a/docs/guides/main.rst
+++ b/docs/guides/main.rst
@@ -127,7 +127,9 @@ place to start::
 
 Change that first path to a directory where you'd like to keep your music. Then,
 for ``library``, choose a good place to keep a database file that keeps an index
-of your music.
+of your music. (The config's format is `YAML`_. You'll want to configure your
+text editor to use spaces, not real tabs, for indentation.)
+
 
 The default configuration assumes you want to start a new organized music folder
 (that ``directory`` above) and that you'll *copy* cleaned-up music into that
@@ -161,6 +163,8 @@ There are approximately six million other configuration options you can set
 here, including the directory and file naming scheme. See
 :doc:`/reference/config` for a full reference.
 
+.. _YAML: http://yaml.org/
+
 Importing Your Library
 ----------------------