Enable kwebkitpart in Konqueror

In KDE SC 4.5.0 it's possible to use a WebKit part for rendering in Konqueror. I don't think it's on by default (I could be wrong) and I believe I've installed all the requirements for it... How do I enable it? I figured out how to switch it... View -> View mode -> webkit But you must be on a web page first. Problem is that this setting doesn't stick. I can't find a permanent setting. Does one exist?