I started watching the second movie tonight on channel 9 while putting stickers on some Generations toys, and had to turn it off after the Decepticons destroyed the aircraft carrier because channel 9 had totally butchered it. It must be because it started earlier than normal, at 8.17pm, so the entire movie had to be censored of extreme violence... which for Transformers movies, are the best bits (for the expensive special effects). The scene where Optimus "dies" had removed him killing Grindor, cutting off Starscream's arm, and the actual thrusting of the sword through Prime's chest (all they show is Megatron appearing behind him, and then him hitting the ground).
And for some reason, they removed the Decepticons crashing into the Aircraft carrier... but kept in the blood-splattering death of the soldier in the Shard vault near the start of the movie, and the execution of Demolishor by shooting him in the head.