“You didn’t hear this from me,” says a Boston-based movie critic, “but Paramount just moved the press screening of Thor, a PG-13 film, from Tuesday, 5.3 — or three days before the 5.6 opening — to a 4.30 Saturday morning screening at 10 am, presumably with a packed kiddie audience. And this is Boston’s only press screening, mind. My guess is that they’re doing this everywhere outside New York and LA.”