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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION: Nested contenteditable scrolls outer window on horizontal select"
   href="https://bugs.webkit.org/show_bug.cgi?id=153872">153872</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>REGRESSION: Nested contenteditable scrolls outer window on horizontal select
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>Safari 9
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Macintosh
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>OS X 10.11
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>New Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>m.lewandowski&#64;cksource.com
          </td>
        </tr></table>
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        <pre>1. Open a demo: <a href="https://jsfiddle.net/fpua774e/">https://jsfiddle.net/fpua774e/</a>
1. Try to select any part in &quot;Try to select some text&quot; text. It's preferable to make a selection horizontally, e.g. from left to right (vertical scroll should not be triggered at all in this case).

**Expected:**

Text is selected.

**Actual:**

Browser goes crazy with vertical scrolling.


I'll just add that CKEditor customers reported this bug to us, and it's a critical bug that makes using CKEditor impossible in Safari (see <a href="http://dev.ckeditor.com/ticket/14314">http://dev.ckeditor.com/ticket/14314</a>).</pre>
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