fixes #10095: note about backwards incompatibility

getting-started.html

@@ -297,7 +297,7 @@ bootstrap/
     <div class="page-header">
       <h1 id="migration">Migrating from 2.x to 3.0</h1>
     </div>
-    <p class="lead">Folks looking to upgrade to v3 should use this section as a general upgrade guide. We've outlined some of the major changes and provided tables that highlight key changes. For an overview, <a href="http://blog.getbootstrap.com/2013/08/19/bootstrap-3-released/">read the announcement blog post</a>.</p>
+    <p class="lead">Bootstrap 3 is not backwards compatible with v2.x. Folks looking to upgrade to v3 should use this section as a general upgrade guide. We've outlined some of the major changes and provided tables that highlight key changes. For an overview, <a href="http://blog.getbootstrap.com/2013/08/19/bootstrap-3-released/">read the announcement blog post</a>.</p>
 
 
     <h2 id="migration-classes">Major class changes</h2>