Should mailto: links work in Qt Assistant?

We are using Qt Assistant as the help viewer for our application, and “mailto:” links do not work. (They work if you open the underlying HTML in a normal browser.) Are they supposed to? I was not able to find any documentation on what HTML features might be disabled.

If they are supposed to work, could the problem be that it is not using WebKit? Is there a way to tell if QTextBrowser or WebKit is being used? The Qt Assistant we are using is one we built ourselves from the Qt sources. (We are building WebKit.)

Thanks for any help you can provide.