Jim had no specific time frame in mind for Vignette, though I like to place it after SK, noting the reference to unicorns not being fun and prancy.
I guess there's not much point in debate over the subject, since there was no intended time period for it, but I think the Vignette could have happened after DM, too, from this quote of Bob's:
"Okay, fine. Suppose we throw intelligence to the winds and only print the truth. 'Vampire slayer, ghost remover, faerie fighter, werewolf exterminator, police consultant, foe of the footsoldiers of Hell.'"
The "footsoldiers of Hell" phrase might be a reference to the Denarians. Of course, given their usual temperament and dastardly deeds, I suppose the term could be applied to most of Harry's enemies, but it seems to apply most readily to the Bad Penny Brigade.