QDir::currentPath() returns different drive for ROM applications between 4.7.4 and 4.8

Main qml is usually set somewhat like this:

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QDeclarativeView view;
    view.setSource(QUrl::fromLocalFile("main.qml"));
    view.show();

    return app.exec();
}

QDeclarativeView::setSource() will end up calling

QUrl::fromLocalFile(QDir::currentPath() + QDir::separator()).resolved(QUrl::fromLocalFile("main.qml"))

Debug prints for Qt Quick application that is in ROM:

Qt 4.7.4
[Qt Message] QDir::currentPath(): "Z:/Private/200346e0"
[Qt Message] QDir::homePath(): "C:/Data"
[Qt Message] QDir::rootPath(): "C:/Data"
[Qt Message] QCoreApplication::applicationDirPath(): "C:/Private/200346e0"
[Qt Message] QCoreApplication::applicationFilePath(): "Z:\sys\bin\componenttest.exe"

Qt 4.8
[Qt Message] QDir::currentPath(): "C:/Private/200346e0"
[Qt Message] QDir::homePath(): "C:/Data"
[Qt Message] QDir::rootPath(): "C:/"
[Qt Message] QCoreApplication::applicationDirPath(): "C:/Private/200346e0"
[Qt Message] QCoreApplication::applicationFilePath(): "Z:\sys\bin\componenttest.exe"

On 4.8 QDir::currentPath() returns C: drive instead of Z:. Main.qml is in z:/Private/200346e0 and end up getting error "file:///C:/Private/200346e0/main.qml: File not found".
Just wondering can that is it ok to change QDir::currentPath() behavior like this between minor versions?

This can be resolved on application level by giving absolute path to QDeclarativeView::setSource() instead.