I thought Czerkas & Czerkas (big book, 1990?) had based their family tree of dinosaurs on something widely accepted... never mind. For some time (later) megalosaurids were repeatedly regarded as possible ceratosaurs, though.
Britt (1991) thought the latter might be the case. Know any other non-popular references?
How widespread are fused nasals outside tyrannosauroids and oviraptorids? (Though this character would certainly add noise only.)
Oviraptorids don't have fused nasals, but abelisaurids and spinosaurids do.
Is it ACCTRAN, DELTRAN or nothing? Does changing this setting change the outcome?
That only changes the characters diagnosing various clades, not the topology. It was DELTRAN though.
Wow, strange. Didn't you get such an assemblage once too?
I've never found a Bullatosauria exclusive of Neornithes (though ornithomimosaurs recently grouped with enigmosaurs), nor have Microraptor or Rahonavis ever claded closer to troodontids than neornithines. I MAY have had alvarezsaurians clade with troodontids in the past, but certainly nothing else. Microraptor and Rahonavis sometimes form a clade, with or without Archaeopteryx.
Does something happen when Bagaraatan is deleted?
It makes tyrannosauroids clade with the bullatosaurs, but that's it.