You know, sometimes for whatever reason, the characters do something that seems out-of-character. Generally this happens in filler arcs/episodes, although sometimes some random scenes get thrown in here and there, to add in a little padding or comic relief, but they're not quite right. I suppose it can happen in the manga too - I always thought it was a little weird that Luffy tried to kill Zoro for attacking the people in Whiskey Peak. The dub has it's crimes too, of course (i.e. Zoro clucking like a chicken).
Some OOC moments I can recall:
In the first TV special, I don't remember the exact situation, but Zoro says something to Sanji like "you get to ask some chicks out before I do". (Yes I'm botching it up badly, but I don't remember it too well, I hated that special).
In the Rainbow Mist filler arc, Nami forces Sanji to carry her shopping bags, even though it was causing him to be electricuted because of the metal in them. Come on, Nami is not THAT much of a bitch.
In movie 2, Sanji thrusting his hips and telling Nami he wants to do "this and that" with her. Not TOTALLY OOC, but Sanji isn't typically that…direct. He's more gentlemanly.
The whole opening scene of Movie 3 where they're all telling Chopper he can't be in their crew if he's a coward. Something is very wrong with this picture. "I-can't-go-to-the-next-island disease" anyone? XD
In the FOXY filler after that lost-memory filler, Nami leaving poor Usopp to be molested by a bunch of horny guys in a jail cell. Again, she's not THAT much of a cold-hearted bitch.
I'm sure there was a lot of stuff in the Warship Island arc too, but I've blocked a lot of that out of memory. One thing I know is that while normally I enjoy every moment that Usopp is on screen, during the Apis story I just wanted to duct-tape his mouth shut and stuff him in a closet. He had PMS or something.
It seems like they tend to over-simplify some of the characters personalities into over-used cliches. Luffy ends up being dumb as a rock, Sanji a ball of raging hormones, Nami a greedy, heartless bee-yatch (and I really think she is certainly NOT, at ALL, BTW), etc..
Anyway, there's my little rant of the evening. Anyone else got some I missed?