Download the Qt5.2.0 Beta1 offline installer (Linux installer used while testing). Compile webkitqml/youtubeview example and launch it from the command line.

tasundqv@IT-D-2VFR5W1:~/tmp/qt5/5.2.0-beta1/gcc/examples/webkitqml/youtubeview$ ./youtubeview
QDir::mkpath: Empty or null file name(s)

--> bad user experience, something went wrong?

Note! similar error detected for Qt example webkitqml/flickrview/flickrview.