[Qt-qml] Win/Lin differences

[Jason H]

I am developing/testing on WinXP, deploying on Lin (TCE/X11/Nvidia ION) 4.7.0 on 
both. I had some surprises...

1. When I set opacity to 255 (errantly) in Win, it renders fine. On Lin, it 
doesn't render at all until opacity = 1
2. Text font.pointSize doesn't seem to be respected on Linux, but pixelSize is 
works.