CKEditor removes <br /> tags in list items

[Jakub Ś]

CKEditor removes <br /> tags (made with SHIFT + ENTER) at end of a <li> tag. It happens when nested lists are used.

<ul>
<li>Test 1
<ul>
<li>Test 1.1</li>
</ul>
</li>
</ul>

If you add a <br />&nbsp; (SHIFT + ENTER) after "Test 1" and switch between WYSIWYG and the Source view, then the CKEditor will remove the <br />.
However, if you add more then one <br /> tag, then only the last one will be removed per each view switch. This happens also on loading HTML into the editor.

Problem has been reproducible in all browsers from CKEditor 3.0.2