[IE7] Selection error when typing text after table

[Garry Yao]

1. Use enterMode BR;
2. Load a table as initial contents:

   <table>
   	<tbody>
   	<tr>
   		<td>
   			text
   		</td>
   	</tr>
   	</tbody>
   </table>
   

3. Put the cursor after the table and start typing × Actual Result: JavaScript error thrown;