QML files not being read when they have 'byte order mark'

In Qt 5.2 I had no problem with this.

I was using the source code on Windows (inside a VM) with Qt 5.2, then I started to use the same code on OS X (main OS) with 5.2 and everything was ok.

When I installed Qt 5.3 Alpha I had this issue:
QQmlApplicationEngine failed to load component
qrc:///qml/main.qml:1 Expected token `numeric literal'
qrc:///qml/main.qml:1 Expected a qualified name id

The same happened using Qt 5.3 Beta.

To test it you can create a default Qt Quick Application and then change the main.qml to have 'byte order mark'.