Using the Delete key causes input boxes to be deleted.

[Doug Lawrence]

Reproduces on the latest version of chrome (24.0.1312.52) in both OSX Mountain Lion and Windows 7.

Steps to reproduce:

1. Go to full demo (​http://ckeditor.com/demo#full)

2. Edit source to replace existing with the following: (this was originally manually typed into the editor)

   <p>This is the first sentence.</p>
   
   <p>This is a sentence with an&nbsp;<input name="input" type="text" /> in the middle.</p>
   

3. Leave source view and put the cursor at the end of the first sentence.

4. On windows, hit the DEL key or on a Mac, use FN+DELETE to get a delete rather than a backspace.

Expected:
The paragraphs should be combined, like this:

<p>This is the first sentence.This is a sentence with an&nbsp;<input name="input" type="text" /> in the middle.</p>

Actual:
The input box and contents afterward are removed:

<p>This is the first sentence.<span style="line-height: 1.6em;">This is a sentence with an&nbsp;</span></p>

[Jakub Ś]

Problem can be reproduced in Webkit browsers from CKEditor 3.3.