The pudding stain on Arnold disappear after he re-enters the school and appears again at Slausen's. It goes back and forth while at Helga's house.
Right before Helga accepts Arnold's gift, there's an animation error with her body.
Shelley's mouth doesn't move, and her nametag goes black for one frame when she goes to remove the cloth from Helga's face.
When Helga grabs Shelley's arm, the background shows the window instead of the door.
When Arnold says, "I never meant for this to happen", his hair seems to be duplicated.
Harold is not moving when Helga hits him with her cane. Also, he has white eyes instead of yellow.
When Gerald and Phoebe are dancing, there's an error with how the animation plays. And when the camera does a closeup on them, a grey part of his suit turns black on some frames.
As Arnold and Helga's tango starts, there's a coloring error with Helga's dress.
As Arnold catches Helga (after saying "There's something I've been meaning to tell you."), the area above his hat goes yellow for an instant.
When Arnold dips Helga right before tossing her into the pool, a small part of his hair is not colored.
When Helga emerges from the pool, the light brown "V" part of her dress is not there.
When Sid and Stinky found Snappy in the water, Sid appears to be wearing a black long-sleeved shirt instead of a tuxedo shirt with the bow tie in it.
But all of a sudden when Sid started panic about being in the water, his black bow tie and short sleeves came back.
Airing[]
When this episode aired for the first time on April 1, 2002, the split-screen airing jingle for the Snee-Oosh logo that is usually shown after the closing credits and continues into the Nickelodeon logo is surprisingly replaced with the ending theme from "Timberly Loves Arnold/Eugene, Eugene!" (which in that case, is the tail end of the closing reprise of "When Life Gives You Lemons, Dance!").
