Amaya 9.52 WinXP crash: removing class from list with list-style-type: none

Hi,

One of my pupils has discovered how to crash Amaya 9.52 for Windows XP:

1. Create a list and give it a class:
<ul class="list">
   <li>First item</li>
   <li>Second item</li>
</ul>

2. Link a css file and write the following rule:
ul.list { list-style-type: none; }

3. Select the ul element and remove the class attribute using the Tools 
window.

4. Amaya crashes.

Best regards,
Bartolome Sintes (http://www.mclibre.org)