Height of the div is not being auto

I have the following code in this fiddle , I want the he开发者_如何学Pythonight of the profile_window_content to be more than the height of the image in jcrop-tracker.Height of div is set to auto , then why it is not greater than image height. Please help.

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Floated content is supposed to fall out of the bottom of containers.

Set overflow to hidden if you want to cause containers to wrap floated elements anyway.