Funnily, 2706 (which already contains the preloader) works fine for me with contrib plugins, but as Ceniza pointed out wxSmith was causing a crash for him, I rebuilt it with 2717 and it *does* crash :shock:
Give me 5 minutes of time to rebuild please, I've now modified the whole contrib workspace to do everything the "canonical" way, consistently throughout. Will see if that fixes it.