diff --git a/15_event.md b/15_event.md
index ce35adb0..a6d331ba 100644
--- a/15_event.md
+++ b/15_event.md
@@ -659,9 +659,9 @@ on it. When it loses focus, the element gets a `"blur"` event.
 
 {{index "event propagation"}}
 
-Unlike the events discussed earlier, these two events do not
-propagate. A handler on a parent element is not notified when a child
-element gains or loses focus.
+Some events, like these two and `"scroll"`, do not propagate. A
+handler on a parent element is not notified when a child element gains
+or loses focus.
 
 {{index "input (HTML tag)", "help text example"}}
 
diff --git a/html/errata.html b/html/errata.html
index 899fd7bf..cce80142 100644
--- a/html/errata.html
+++ b/html/errata.html
@@ -114,7 +114,7 @@ <h2>Chapter 19</h2>
 
 <h2>Chapter 20</h2>
 
-<p><strong>Page 367</strong> <em>A File Server</em>: The part that
+<p><strong>Page 367</strong> (10th) <em>A File Server</em>: The part that
 talks about “the output stream to the request” should say “the stream
 from the request” instead.</p>