Okay, to carry on a popular topic of debate....how important is it to you that The Joker has white skin, rather than white make-up?
For me, this has long been my hard-limit, as far as the visual elements of The Joker's character goes. I was fine with the cut-smile. I was open to them changing his costume (though that's turned out to be a lot more faithful than I expected). But some people are deriving from these set pics that The Joker's flesh-tone hands and neck mean he applies white make-up to his face. And I can't say I'm happy about that.
Of course, this is far from confirmed. These pics were all taken during breaks from filming, with Ledger not in full costume. For all we know, he could put on gloves, then his jacket, then they touch up his neck with additional white. I still think The Joker will have white skin. But at the same time, we should be prepared for the possibility that he wears make-up in the film.
Here's my terms on that. I can live with it, if we don't ever see his face without the make-up. It's a change I'm not happy with, but if The Joker's going to look like this...
...and act like classic Joker (which reports would very much indicate he'll be doing), then Heath Ledger can still pull off a performance that will fittingly represent The Joker we know and love.