[Interest] Qt5 QFileDialog Directory Only behavior different on Xp and Windows7

[Duane]

I'm using this :

QFileDialog fd(this,"Select folder",targetFolder);
fd.setFileMode(QFileDialog::Directory);
fd.setOption(QFileDialog::ShowDirsOnly);

  if(fd.exec() == QDialog::Accepted) { ...

}


On windows7 (and linux) this works as expected.  It opens with only 
directories displayed and the "ok button" reads "Select Folder".

On Windows XP, the user gets what looks like a typical file dialog to 
select existing files.  The button says "Open" but doesn't do anything 
when it's clicked.

Any ideas?