When sitting around the campfire, all the boys are on the same side, sitting next to each other. Yet when Cartman starts to tell his story, Stan is sitting opposite them.
When Cartman begins the Tale of Scuzzlebutt, Stan's arms are missing, but reappear the next time he's seen.
Scuzzlebutt's size changes in a few minutes. At first, he only slightly taller than a human. When he saves Jimbo and the others, he is way taller than that. Not much later, when the mayor thanks him, he is back to human-size again.
At 3:16 Jimbo tells the boys "that there is a rocky mountain black bear," but the bear shown is brown.
At 6:47 Chef says "...but you see Mr. Mayor..." However, Mayor McDaniels is a female.
The three clocks on the wall behind Randy read: NY - 11:05, SP - 9:35, LA - 8:05. Being on Mountain Time, SP should be at 9:05.
After learning that the volcano was going to erupt, Chef tells the mayor that some children were camping up on the mountain. It's never established that Chef knew this beforehand.