I have found a solution to a problem with scaling of images in single blog posts, when align is set to none.
I had a problem with images not scaling down to the width of the content container, something that I was expecting even if the images was to be a very large, 2500 px in this case. All worked ok as long as I was a aligning the images, but not when align:none was chosen.
The solution was to copy a line in base.css and change it to be used witn alignnone:
body .alignnone, .entry-content a:hover .alignnone{ clear:both; display:block; margin:10px auto; padding: 10px 0; }