diff --git a/examples/mutexes/mutexes.go b/examples/mutexes/mutexes.go
index c2068b2..b18eb52 100644
--- a/examples/mutexes/mutexes.go
+++ b/examples/mutexes/mutexes.go
@@ -1,6 +1,6 @@
 // In the previous example we saw how to manage simple
 // counter state using [atomic operations](atomic-counters).
-// For more complex state we can use a _[mutex](http://en.wikipedia.org/wiki/Mutual_exclusion)_
+// For more complex state we can use a <em>[mutex](http://en.wikipedia.org/wiki/Mutual_exclusion)</em>
 // to safely access data across multiple goroutines.
 
 package main
diff --git a/examples/mutexes/mutexes.hash b/examples/mutexes/mutexes.hash
index 296215c..a175d8e 100644
--- a/examples/mutexes/mutexes.hash
+++ b/examples/mutexes/mutexes.hash
@@ -1,2 +1,2 @@
-e82356cbb37143862b0a9bbc68856f4b272c4918
-a9Wky7k-Bw
+b62f93a169c2d9141b2f7edceb840ede59598bd7
+tWqg2zQSVpb
diff --git a/examples/rate-limiting/rate-limiting.go b/examples/rate-limiting/rate-limiting.go
index 44c76b1..8a131cb 100644
--- a/examples/rate-limiting/rate-limiting.go
+++ b/examples/rate-limiting/rate-limiting.go
@@ -1,4 +1,4 @@
-// _[Rate limiting](http://en.wikipedia.org/wiki/Rate_limiting)_
+// <em>[Rate limiting](http://en.wikipedia.org/wiki/Rate_limiting)</em>
 // is an important mechanism for controlling resource
 // utilization and maintaining quality of service. Go
 // elegantly supports rate limiting with goroutines,
diff --git a/examples/rate-limiting/rate-limiting.hash b/examples/rate-limiting/rate-limiting.hash
index 3eaf668..81be22f 100644
--- a/examples/rate-limiting/rate-limiting.hash
+++ b/examples/rate-limiting/rate-limiting.hash
@@ -1,2 +1,2 @@
-d74aebb12f618f22ec776eb5b4de92985104c197
-e7yzIk97-p
+b8dbdb8d53386f00ff900fea62db400d962b4834
+h9TUTv494TN
diff --git a/public/mutexes b/public/mutexes
index 4867e83..83935b9 100644
--- a/public/mutexes
+++ b/public/mutexes
@@ -42,7 +42,7 @@ to safely access data across multiple goroutines.</p>
             
           </td>
           <td class="code leading">
-	        <a href="http://play.golang.org/p/a9Wky7k-Bw"><img title="Run code" src="play.png" class="run" /></a>
+	        <a href="http://play.golang.org/p/tWqg2zQSVpb"><img title="Run code" src="play.png" class="run" /></a>
             <div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span>
 </pre></div>
 
diff --git a/public/rate-limiting b/public/rate-limiting
index 224292d..f453286 100644
--- a/public/rate-limiting
+++ b/public/rate-limiting
@@ -43,7 +43,7 @@ channels, and <a href="tickers">tickers</a>.</p>
             
           </td>
           <td class="code leading">
-	        <a href="http://play.golang.org/p/e7yzIk97-p"><img title="Run code" src="play.png" class="run" /></a>
+	        <a href="http://play.golang.org/p/h9TUTv494TN"><img title="Run code" src="play.png" class="run" /></a>
             <div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span>
 </pre></div>