[FF] Increasing indent erases an entry

[w.olchawa]

Encountered in FCKeditor 2.6 RC using Firefox 2.0.0.12

Steps to reproduce:

1. Paste the following code in Source View:

<ul id="foo" class="bar">
  <li>Item1</li>
  <li>Item2</li>
</ul>

2. Go to the WYSIWYG view.

3. Place you cursor inside "Item1"

4. Press Increase Indent

5. "Item2" disappears.

Same thing happens when using numbered lists.

Expected behaviour:

The Increase Indent button should be disabled when the cursor in the first line of the list.