Superskrull - S1-E7
Continuity mistake: When Lyja is telling the Skrull Emperor that the fight between Super Skrull and Thing is turning back to their favor, the light purple area of her costume around her chest and neck is not filled in properly, with about half her neck and one-third of her chest being visible. (00:14:01)
Superskrull - S1-E7
Plot hole: When Thing clobbers Super Skrull with the palm tree, Super Skrull flies back into the arms of Reed, who has disguised himself as a palm tree. While Reed can use his stretching ability to change his facial appearance, he can't change the color of his costume to cause his body to resemble a tree trunk and his arms and hands to resemble palm leaves. (00:19:18)
Superskrull - S1-E7
Audio problem: When Reed says "Exactly" after Johnny notes that Super Skrull has whole planet source backing him up, his mouth is closed for the third syllable. (00:17:34)
Superskrull - S1-E7
Continuity mistake: When the landlady takes a swing at Thing, there is a police officer and a bunch of lab equipment on her left. When the shot changes, Reed, Johnny and Sue are suddenly on her left. (00:16:40)
Superskrull - S1-E7
Continuity mistake: When Super Skrull knocks Thing away after the helicopter leaves, Thing lands facing Johnny and Sue. When the shot changes, he now has his back to them. (00:14:07)
The Mask of Doom: Part 1 - S1-E8
Continuity mistake: When Dr. Doom's robots are first seen in the pod, there are only three of them. When the shot changes, there are suddenly several more. (00:02:45)
Superskrull - S1-E7
Continuity mistake: When Reed is working on the jammer device, the positions of Sue, Johnny and Thing around him change numerous times. (00:17:11 - 00:17:59)
Superskrull - S1-E7
Continuity mistake: When Reed is speaking to Super Skrull through the megaphone, the white streaks in his hair are missing. (00:18:26)
Superskrull - S1-E7
Other mistake: When Manny Friendly is entering the Fantastic Four's lab, he is running in place for several steps. (00:15:49)
The Mask of Doom: Part 1 - S1-E8
Continuity mistake: When Johnny is listening to music and drumming with pencils, a stack of papers appears on the desk, and the paperweight moves from roughly the center of the desk to the far corner. (00:02:24)
The Mask of Doom: Part 1 - S1-E8
Continuity mistake: The trap doors that Dr. Doom drops the heroes down in don't appear until they are being opened. (00:08:03)
Superskrull - S1-E7
Audio problem: When Thing is first shown singing "It's clobbering time" at the end, his mouth is wide open. (00:20:30)
Superskrull - S1-E7
Deliberate mistake: When the Army soldiers are all walking towards Super Skrull, they all have the same face. (00:14:57)
The Mask of Doom: Part 1 - S1-E8
Audio problem: When Sue says "Stop, Reed" while practicing their dance moves, her mouth is closed. (00:01:32)
Superskrull - S1-E7
Continuity mistake: The rectangular device Reed places on the plate changes position between shots. (00:17:24)
Superskrull - S1-E7
Continuity mistake: When Sue uses a force field to block Super Skrull's fire blast, Reed's hair is incorrectly colored blonde. (00:12:55)
Superskrull - S1-E7
Continuity mistake: When Johnny pulls out the business card, the way he is holding it between his fingers changes after Reed finishes reading it. At first, the card is horizontal. When the shot changes, it is vertical. Additionally, the telephone and fax numbers at the bottom have disappeared. (00:07:08)
The Silver Surfer & the Coming of Galactus: Part 2 - S1-E6
Continuity mistake: When Galactus is returning to his ship after exiling the Silver Surfer to the Milky Way Galaxy, his legs are bare, when he was previously wearing blue pants. (00:19:39)
The Silver Surfer & the Coming of Galactus: Part 2 - S1-E6
Continuity mistake: When Thing is saying that Galactus can't be trusted, the white waistband of his trunks is incorrectly colored the same blue as the rest of the trunks. (00:19:00)
The Silver Surfer & the Coming of Galactus: Part 2 - S1-E6
Revealing mistake: When the Fantastic Four's landlady stops short of the open manhole, her dog suddenly jump cuts back a few inches. (00:17:29)
Answer: Gleaned from the Internet: Much of the negative reaction was due to the poor, simplistic, and outdated quality of the animation where the characters moved stiffly and clumsily through scenes. There were also some obvious animation compositing gaffs. The animation colors were also criticized as being overly bright and cheery and out of character to the established story's darker tone. The broad humor of the first season was replaced by a more mature narrative between the characters.
raywest ★