Unnecessary paragraph gets created when trying to join two paragraphs using backspace

[Jakub Ś]

Issue reproducible in Webkit from CKEditor 3.0

1. Paste in the following code

   <p>
   	Line 1<br />
   	Line 2<br />
   	Line 3<br />
   	Line 4</p>
   

2. Put cursor behind Line 2^ and press ENTER
3. You will get

   <p>
   	Line 1<br />
   	Line 2</p>
   <p>
   	<br />
   	Line 3<br />
   	Line 4</p>
   

4. Put the cursor in front of ^Line 3 and press BACKSPACE two times to delete br and 'join two paragraphs'

Result when switching to source in Webkit:

<p>
	Line 1<br />
	Line 2Line 3</p>
<p>
	Line 4</p>

while in other browsers:

<p>
	Line 1<br />
	Line 2Line 3<br />
	Line 4</p>