probably a wrong cookie parsing in QNetworkCookie class.

for the example lets try to login on wordpress.com site using QWebView class (qt 4.5.3)

link:
http://wordpress.com/wp-login.php

try to type:
login: qttesting
password: qtesting

its nothing happened. The question is why ?. Ofcourse i have installed openssl and QSslSocket::supportsSsl() method returns true value. So i think the problem is in QNetworkCookie class (parseCookies method).