Corrected entry: When Susan transforms into Ginormica, her dress tears a little, but still manages to stay on and mostly 'grow' along with her. It's a kid's movie, so they couldn't show her in underwear, but it's still a [deliberate] mistake.
Corrected entry: The tracking station picked up the meteorite but never detected Galaxar's ship.
Correction: Galaxar's ship presumably can evade human technology, a meteorite is just a meteorite.
Corrected entry: Susan's hair appears to change in relative length (this is as noted when she is standing with her head/neck straight). In the scenes at the church, Susan's hair, at the back, hangs to a point ABOVE her shoulder line (and this is in continuity with all prior scenes). When Susan grows, her hair stays the same relative length (proportionally), only changing in colour. She is then knocked-out and captured. In the first scene at the secret facility, when Susan wakes up from her drug-induced sleep, her hair is noticeably longer at the back than at capture, the equivalent of a inch or two (relative to her original height), and hangs about her shoulders. Susan's subsequent actions and dialogue indicate that the location is new/foreign to her. This would imply that she was asleep for some weeks, probably as much as three or four months, which seems unlikely. Susan's fringe does not, however, appear to change in relative length.
Corrected entry: The whole reason for locking Susan up in the facility is to keep her a secret from the outside world. One tiny problem though: About a hundred people at her wedding saw her grow into a giantess. That's not something you forget very easily. Even later, when she visits Derek and her parents, they have little to no reaction to her changed self. Shouldn't the government have taken precautions to make sure they wouldn't blab?
Correction: This is a question, not a mistake. We don't see what containment measures the Government takes after removing Susan from the wedding; they may have sworn everyone to secrecy or face imprisonment. When Susan goes to visit Derek and her parents the people are the same ones who attended the wedding, they've already seen Susan's big change.
Corrected entry: At the end of the Golden Gate Bridge scene, B.O.B. does not get off the bridge before it collapses and no one goes back to save him. But he is seen on the remaining half of the bridge looking down on the scene.
Correction: It's very quick but as the bridge collapses, you can see Bob standing right at the edge of the where the bridge breaks on the safe side. It's shown right after Susan picks up Dr. Cockroach.
Corrected entry: As a professional synthesizer, the Yamaha DX7 did not have any accompaniment and rhythm components as utilized by the President when greeting the robot. None of the DX-series had anything like that. This was "incorrectly corrected."
Correction: We're talking about a keyboard intended to communicate with alien species, so modification is almost certain. For all we know, ALL of the electronics in the keyboard were replaced or modified.
Corrected entry: When Dr. Cockroach is trying to bring Ginormica back to normal size, Link says, that the Doc has been experimenting with it for over a month. Later in the movie, when Derek is breaking up with Susan, she says "You wouldn't believe my last three weeks!" That means that she says she's been in prison for three weeks, but Link says that she's been there for over a month.
Corrected entry: After climbing all the steps, the president first plays the five-note tune from Close Encounters of the Third Kind, then gives Mr. Spock's Vulcan salute from Star Trek.
Correction: This is not trivia - it's just obvious observations from watching the movie.
Correction: Both Susan and the clothing she was wearing at the time were affected by the Quantonium meteorite, so its hardly surprising both her and the clothing grew together. If the clothing had not grown, then even her underwear would not grow, and she'd be standing naked at 50ft tall.
The Yeti