It appears that Gdk is simply not filling in the right GDK_MOD1_MASK bit in event->key.state values. A more complete exploration of this problem is listed in https://bugs.launchpad.net/inkscape/+bug/167290
It appears that Gdk is simply not filling in the right GDK_MOD1_MASK bit in event->key.state values. A more complete exploration of this problem is listed in https:/ /bugs.launchpad .net/inkscape/ +bug/167290