An extra (the white-haired Alphan played by Micky Clarke) appears as a member of the medical team in the Solarium with a white sleeve, but shortly after appears in a hallway elsewhere with a rust-colored sleeve.
As the Taybor comes in to land a second time, two men in a space buggy are told to move quickly out of the way. In the following long shot, the buggy, with two figures that bounce around only the way that plastic dummies can, speeds away across the Moon's surface.
When Taybor's telling Koenig that his home world is called Pinvith the Lesser, Willoughby Goddard mispronounces it as "Pinvinth". Koenig repeats it and miraculously pronounces it correctly.
When Maya finally reappears in Command Center, the regular characters respond, but the background extras never look away from their consoles as though they were robots (the blame likely goes to the inexperience of newcomer director Bob Brooks, whose previous experience had been directing TV commercials).
There is no logical reason for Maya's glass holding cage to shatter when she transforms into "a female version" of Taybor.
The Taybor displays a license that he says is valid throughout the solar system. This is actually laughably unimpressive. The solar system is only one of 400 billion such star systems in the galaxy alone, and it would, in effect, only give him permission to trade with Earth and the Moon. (Note: The solar system Taybor's referring to was not Earth's, but a locality relatively close to the Moon's current position in space). It is odd that with his travel ability, he'd restrict himself to trading within a single solar system (unless a license is required only in that particular system).