[Qt-interest] QFileDialog::getExistingDirectory and multiple selection

[Robert Caldecott]

I am using Windows/Qt 4.7 RC and the QFileDialog::getExistingDirectory
function seems to allow the user to select multiple folders and if
they do then an empty string is returned.  Digging around I can't see
how to:

1. Disable the ability to select more than one folder.
2. Find out which folders were selected if they select more than one.

Is this a known Qt issue?