Comment 5 for bug 870874

Probably final comment from me, I found a workaround that "solves" the problem for me.
If you don't need QT Accessibility:

Edit `/etc/X11/Xsession.d/90qt-a11y', put a `#' in front of all lines:

# -*- sh -*-
# Xsession.d script to set the QT_ACCESSIBILITY env variable when accessibility
# is enabled.
#
# This file is sourced by Xsession(5), not executed.

#if [ -x "/usr/bin/gsettings" ]; then
# a11y_enabled=$(gsettings get org.gnome.desktop.interface toolkit-accessibility)
# if "$a11y_enabled" = "true" ]; then
# export QT_ACCESSIBILITY=1
# fi
#fi

This work around might break with updates.