This is happening to me as well. I have your current version (.9) and it removes images from any post or page. It also removes code, such as that generated by Fast Secure Contact Form, e.g., [si-contact-form form=’1′].
This is a fantastic plugin otherwise, and yet I cannot use it at all with this problem.
I can put <!–nolinks–> into every page or post, and my images and forms reappear, but that defeats the purpose of having the plugin, since every post has either images or code or both.