Patzer

In the opening title sequence of the show, Spider-Man is shown, "in the chill of night", looking out of a window at a jewelry store. The store's sign displays the words "FINE JEWLERY". When Spider-Man swings down and kicks the door open, the sign has become "FINE JEWELRY".

Through out the series the Spider emblem on Spider-Man's suit switches between having 6 legs to having the correct 8. Noticable from season 2 onwards when the episodes start reusing more footage.

Due to the low quality animation, Spider-Man can be regularly seen swinging off webs that appear to be connected to nothing but the sky. This mistake has been the subject of a fair few memes.

Any time before Peter Parker changes into Spiderman, he is seen wearing a blue sports coat. But during the changing, he is seen removing a white lab coat.