Due to the pressure of the American dubbing studio, the animation had to be rushed, and this resulted in numerous animation errors. These include characters growing huge or shrinking to a small size between shots, the absence of lip-movement when someone is talking, and a constant shuffling of color schemes. Sometimes, even the background art was inconsistent. Another animation fault of the early episodes was sliding still pictures over the screen instead of animating the characters fully.
English version: In many episodes, the voices of the characters change randomly. This is most blatant in episode 50 (Union), in which Demolishor spends the entire episode (apart from a single line) talking in Hoist's voice.
English version: When leaving Cybertron, Optimus entrusts the planet's protection on a shadowy figure who he calls Thrust. It's actually Jetfire - Thrust is an evil Decepticon, not one of Optimus' men.
In the early episodes, Hot Shot is sometimes called Hot Rod. Later when Tidal Wave appears he is sometimes called Shockwave. Mixing up the character's English and Japanaese names was actually a fairly common mistake. At one point, a character refers to Optimus by his Japanase name, Convoy.
The named of the Mini-Cons constantly get mixed up in several episodes. Leader-1 is the name of Megatron's Mini-Con, but at instances Optimus Prime's Mini-Con (Sparkplug) is referred to by that name. Sometimes the names of Grindor, Hard-Wire, and Sureshock get mixed up as well.
Overload, the giant red Transformers who can combine with Optimus Prime simply appears among the Autobot crew from one episode to another, but it is never explained where he came from or who he even is.