(sigh) Guys it looks like the Joker evolves throughout the movie....
Stage one: Theatrical thief who is normal in appearence albeit with green streaks dyed through his hair, leaves a calling card (we all know what it is) leading the press to nickname him the Joker. Mister J is a bit cruel and heartless with little regard for life but is not yet the pyschopath he will become.
See the bank robbery for examples of stage one.....
Stage two: At some point during escape from said bank robbery Bats intervenes throwing a batarang and severing J's zipline, the resulting tension in the line scarring his face in the manner of a f****d-up smile.
Resulting disfigurement drives J's insane and along with the media dubbing him The Joker he decideds to take it a stage further and add clown paint (shudder, for the record I HATE this idea). It also allows for a personal vendetta against Bats. (this zipline idea may or may not be acccurate but it has been floated around and the zipline escape was filmed)
Stage three: As J heats up with his war on Gotham and begins to elimnate the various gangs, plants bombs, messes with ferries etc. its begins to become clear that he has become truely insane, a mass murderer with no regard for life. At this point his make-up begins to become uneven, the dry cracked face paint that has been alluded to on BOF, the sloppy lipstick smeared over his face......
All this is conjecture of course....but I don't like it
J should be J, bleached white, from beginning to end. He should be bats**t insane from the time we first see him right untill his bleached white ass is thrown in Arkham. I don't want to see his look change or development darn it!