osx: loading two sets of Qt binaries
The bundles generated with PyInstaller under osx result in this warning, and seemingly a subsequente crash is caused by this. My qt libraries are installed under /usr/local/Cellar/qt (using brew).
If I move Cellar/qt folder out of that way, the problem dissapear. It might have to do with some bug in the PyInstaller PySide hooks.
(from redmine: created on 2015-07-29, closed on 2016-05-18, relates #7314 (closed), relates #7352 (closed))