I've just been reminded of this from reading another question. For the first Season of Naruto (before the Chunin Exams) i've seen 3 openings.
Southen Cross 10's Toasted TV (Dubbed - Zabuza's blood spurt from Haku and Kakashi being blind-sided by shuriken are black and white freeze frame. Naruto Poison scene is normal)
Cartoon Network (Dubbed - no censor as far as i know)
DVD (Dubbed - No Censor)
i suspect also the 4Kids version which for the Naruto Poison scene, Naruto is complaining about dropping his lunch, may also have a different opening however i actuly have never seen that (however i hear it notorious since it changes so much)
i am wondering why there are so many different openings for the same episodes?
NOTE: the Naruto Poison Scene is after they fight the 2 Water Ninja and Naruto makes that speach of not running away after extracting the poison with a Kunai. Kakashi then says something like
Ahh Naruto, that was cool how you took out the poison and all, but if you don't treat the bleeding soon, your going to die. *pause* it's a good idea to stop the bleeding now
EDIT: all 3 openings i have seen occur for the same episodes, ie. Episode 2 on the DVD has one opening, the same episodes on Cartoon Network and Toasted TV has different openings.