@@ -18369,28 +18373,22 @@ XXX selection ranges -->
   </ul>

   <p>The transitive closure of all the <span title="scripting
   context">scripting contexts</span> that are <span>reachable
   scripting contexts</span> consists of a <dfn>unit of related
   scripting contexts</dfn>.</p>

   <p>All the executable code in a <span>unit of related scripting
-  contexts</span> must execute on a single conceptual thread. While a
-  script is executing, no other scripts in that <span>unit of related
-  scripting contexts</span> must be started.</p>
-
-  <p>Events fired by the user agent in response to user actions must
-  be queued, as must the execution of any timers. There must be only
-  one queue per <span>unit of related scripting contexts</span>. When
-  no script in the <span>unit of related scripting contexts</span> is
-  executing, the oldest entry in the queue must be processed, either
-  by firing the appropriate event, or by executing the relevant timer
-  callback code.</p>
-
+  contexts</span> must execute on a single conceptual thread. The
+  dispatch of events fired by the user agent (e.g. in response to user
+  actions or network activity) and the execution of any scripts
+  associated with timers must be serialised so that only for each
+  <span>unit of related scripting contexts</span> there is only one
+  script being executed at a time.</p>