P tags added to end of source when applying styles

(I'm not really sure where bug reports go. I posted this to the Help forum but got no reply. Trying here. I just want to be sure if this is a bug it gets to the right people.)

CKEditor Version: 3.6.4
Browser: Safari 6 or Chrome 21

We have a problem where empty paragraphs or breaks get added to the end of the source without cause. I have boiled it down to a simple case. You can reproduce it easily in the CKEditor demo here:

http://ckeditor.com/demo

Steps to reproduce:

1: Open a CKEditor

2: Click Source to switch to source code view

3: Enter this HTML:

<div><ul><li>test</li></ul></div>