In "Do Over", when Strong Bad redoes the Tandy 400-era emails, the star logo is further left than in the original emails and the word "contrast" is written in a different font.
In "Pizzaz", the ship's captain version of Strong Bad's right arm is missing during most of the first interview, making his hand float somehow. It reappears when he shouts "This interview is over!"
In "Animal", when Strong Bad describes how he would first look if he were a made-up animal, he describes himself as having, among other things, horns. However, when one sees how he actually looks after he describes himself, Strong Bad is seen as having antlers, which have been mistaken many times for horns.
In "Dreamail", the official French abbreviation for Monsieur is "M.", but it is misspelled as "Mssr." in the "French Countryside" dream email. This may be based on the abbreviation "Messrs." or "Mssrs.", standing for Messieurs, the plural of "Monsieur". The spelling also resembles the way French actually pronounce "Monsieur", which Strong Bad imitates.
In "Other Days", when Homestar says "so many frags" and is looking to the left, his torso is flipped, and consequently the buttons on his collar appear on the wrong side and "Diskettes Etc." appears backwards for a split second. However, this does not happen when he says "No, yeah, no?".
In "Car", Strong Bad spins Homestar's "buzzer" counterclockwise, but instead it turns clockwise.
In "Lunch Special", when Strong Bad angrily throws the mirror at the ground, Bubs' reflection can still be seen in the mirror, but with no body.
In "Pom Pom", when Strong Bad writes the letter to Pom Pom's parents, he calls them General and Fraulein Pom Pom. The term "Fraulein" is German for "young woman", used primarily for women who are young and unmarried. The correct term to be used is "Frau" (or "married woman").