Changeing table properties when cursor inside <caption> failes

[Saare]

Load the following content and selection:

<table border="0" style="width: 150px;">
	<caption style="border:solid 1px black">
		Table^ title</caption>
	<tbody>
		<tr>
			<td>
				&nbsp;</td>
			<td>
				&nbsp;</td>
		</tr>
	</tbody>
</table>

• Right click and select table properties.
• Click OK.

JS error is thrown.
Not a recent regression.

[krst]

Under IE8,error is thrown when OK is pressed

Message: 'type' is null or not an object
Line: 36
Char: 784
Code: 0
URI: http://nightly.ckeditor.com/6621/ckeditor.js

[garry.yao]

Expired on trunk.