doesn't capture all images on sites that only load images on scroll down

[danlion5150]

webkit2png doesn't appear to capture images on sites that only load images when scrolled down.

A good example is: http://www.huffingtonpost.com/

Here is the (truncated) version that webkit2png captures:

And here is the (truncated) version that the Chrome extension Awesome Screenshot captures:

I'm not sure if there is a workaround for this, or if this is by design (to not capture all images), but it would be nice if there was a command line option to do so.