I've had a new version of webkit2png ready to release for over 4 years now. Until today I'd just never got around to pushing it out the door.
The new version includes a bunch of random bug fixes and some new options. The most interesting change is a
--delay flag that makes it possible to take screenshots of websites that do things after the page loads, which is particularly useful for sites that use flash.
While I was at it, I also spruced up the instructions, relicensed the code under the MIT license, and uploaded the complete revision history to GitHub.■