Memory leak warning when using QWebView::setUrl() in debug builds

Say your application has a QWebView widget. Now, if you run your application and do nothing with your QWebView widget, then there won't be any memory leak (as expected!). However, if you use the setUrl() method to open a web page, then upon leaving your application, you will see some memory leaks in the Application Output window (when running from Qt Creator; in fact, you will also get a couple of QFont-related issues):

QFont::setPixelSize: Pixel size <= 0 (0)
QFont::setPixelSize: Pixel size <= 0 (0)
LEAK: 3 XMLHttpRequest
LEAK: 28 CachedResource
LEAK: 1302 WebCoreNode

Attached is some sample code that illustrates the issue. If you start the application and close it within 3 seconds, then setUrl() won't be called and no memory leak will be reported. If you wait more than 3 seconds, setUrl() will be called and then, upon leaving the application, you will see something similar to the above output.