Stuart:

there are a couple of things at play here. Now don't take this as the absolute truth, as I might remember wrongly where I left off, but only as some hopefully helpful pointers...

Basically helloqt5 project should compile when compiled against Qt5. But the QML files are not okay for running under Qt5. Right now they import QtQuick 1.1 (on Qt5 should be 2.0) and com.nokia.meego 1.0 (on Qt5 should be 2.0). The plan is to do similarly as in qt-components project, so that when building against Qt5 the resulting imports are replaced. But it's not done yet, so it must be done manually. This is written in the projects' README but is easy to miss.

Also notice that I've made some mistakes in the commits to helloqt5, the version numbers in imports in main.qml are wrong and should be as in MainPage.qml.

So, when you've transferred the QML files to device, replace the versions in the QML imports to 2.0 and you might get a bit farther.