In my sample application, I set a very simple stylesheet at the root level, which I expect to be applied to all widgets. However there is a file dialog under the print dialog that does not seem to be affected by the stylesheet at all.

To recreate:
1) Start the attached program.
2) Select Print from the File menu.
3) Click the tool button that allows you to select an output file.
4) A file dialog appears that has none of the expected attributes from the application's stylesheet.

Expected: A file dialog with colors set by stylesheet.
Actual: A native file dialog with no stylesheet attributes.