I have the same issue with TinyMCE and TinyMCE Advanced.
Consider the following html code:
<div class="someclass"> <img class="alignnone size-full wp-image-88" title="some title" src="Shape.png" alt="" /> </div>
When you select some item and place a div style around it, you can no longer continue to add to your post, below this item. There is no way to select there. You *must* go to html view and add a paragraph.
This isn't something that clients are happy doing. Is there a hack to fix this? I've tried about a hundred things, maybe you can help?