John Nack replied to this 3 years ago on his blog. http://blogs.adobe.com/jnack/2009/05/some_thoughts_about_the_psd_format.html http://blogs.adobe.com/jnack/20

John Nack replied to this 3 years ago on his blog. http://blogs.adobe.com/jnack/2009/05/some_thoughts_about_the_psd_format.html http://blogs.adobe.com/jnack/2009/05/some_thoughts_about_the...