Okay, at the very end of the movie, when Jack Sparrow (Johnny Depp) falls off the ledge of the fort, his blck eyeliner is in tact. Then when he is pulled onto the boat, you notice it's running, really bad. Then they cut to when he is mumbling the pirate song, and it's all fixed. I think they may have wanted to think of some water proof eyeliner. The same thing happens when he rescues Elizabeth Swan(Kiera Knightly).