Corrected entry: The tracking station picked up the meteorite but never detected Galaxar's ship.
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?
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.