Continuity mistake: When Eddie unfastens his suspenders, the glass he placed on the newspaper changes its position between shots. (00:36:05)
Revealing mistake: As soon as Eddie walks into the Ink & Paint Club to see Donald and Daffy on stage, a shadow of one penguin's drink tray is cast on the wall near stage left. However, the penguin's shadow isn't animated into this shot. Instead what we can see is a shadow of the pole, which was used by puppeteers to carry the tray around the club before any animation took place. (00:15:00)
Audio problem: As Eddie walks into the bar with Roger stuffed into his coat, you can hear somebody shooting pool. But only two seconds later Eddie walks past the pool table and, here, we can see one of the patrons actually passed out and laying down on top of it. It would be impossible to shoot pool under those circumstances, which means the pool ball noises were dubbed over. (00:43:20)
Continuity mistake: When R.K. Maroon is in his office expecting a visit from Eddie, he takes a pistol and slides it about halfway into his pocket. But between shots, the pistol slides all the way in. (01:05:00)
Revealing mistake: In the shot where Roger looks out of Eddie's apartment window to see the weasels approaching, you can see how their animations overlap the window sill as they cross the street. (00:40:20)
Continuity mistake: After Eddie questions what happened with Earl, his friend with a notepad writes "Laid off." But he grips the pad in a different manner between shots. Note the position of his index finger when he shows Eddie the message. (00:11:35)
Audio problem: When the Toon Patrol shows up at Eddie's door in search of Roger, they start knocking and the door shakes in response, but sometimes no sound can be heard to correspond with the door's movement as they knock. (00:40:45)
Audio problem: The first thing we can hear as Eddie walks upstairs into the bar is a rack of pool balls being broken. But two seconds later he greets his buddy Harry, and at this point we can see how all of the balls have settled and a player is lined up and prepared to take his shot at the corner pocket. It takes more than two seconds for a rack of pool balls to settle. (00:11:20)
Audio problem: When one of the bar patrons talks about Earl's two week notice, he says "Put the poor guy on two weeks' notice," but at the point where he says "guy" his lips are forming an altogether different word. (00:11:40)
Continuity mistake: The driver's side windshield wiper on the Toon Patrol car moves itself to a different position as Eddie and Roger try and make a getaway near the bar. When Eddie looks for a key, only some of the wiper actually makes contact with the windshield, but one shot later the wiper has moved significantly further towards the center. (00:57:25)
Continuity mistake: After leaving Judge Doom to be flattened by the steamroller, Eddie runs over to the dip machine and turns off the ignition. If you watch as Roger and Jessica are about to be blasted with dip, the stream of dip goes from being on their left side, to right, then back to left again between shots. (01:28:35)
Continuity mistake: A few seconds after Eddie makes the big turn in Toon Town's tunnel, his right thumb noticeably changes its position on the steering wheel between shots. (01:09:50)
Continuity mistake: When Eddie first walks into the bar, he approaches Earl - keeled over on a table. Earl is wearing his hat, but one shot later the hat is lying flat on its top so that Eddie can place it back on his head. (00:11:20)
Continuity mistake: During "Somethin's Cookin'", Roger lands himself in a wall-mounted ironing board. As he emerges seconds later to a barrage of sharp utensils, notice how there's a wall outlet installed just below and to the left, but it wasn't previously there when he flew into the ironing board. (00:03:10)
Continuity mistake: Towards the end where Greasy laughs himself to death behind the dip machine's wheel, from the point at which he falls out until his ghost appears, the driver's side door window cranks itself halfway open. (01:25:30)
Continuity mistake: Upon entering Toon Town and crashing into Jessica Rabbit's Packard Eight, Eddie's steering wheel rotates all by itself - as indicated by the spoke positioning itself between his hands all of a sudden. (01:10:35)
Continuity mistake: As Eddie sits at his desk and starts looking at the second Catalina vacation photo, his hands grip the stack of photos in different locations between shots. (00:26:20)
Audio problem: In the scene when Eddie goes to give Maroon the fake will, Maroon says "I'm a cartoon maker, not a murder!", when he says "Murder" his lips aren't moving at all. (01:06:35)
Continuity mistake: After Eddie and Roger spring Benny the Cab from the Toon Patrol's car, the amount of sunlight being cast changes instantly between shots. (00:57:50)
Continuity mistake: After Roger has a violent reaction to R.K's drink, a decanter bursts open and leaves bourbon all over the blinds. But moments later when Roger crashes through the window and leaves an outline of himself, the blinds are completely dry. (00:24:20)
Answer: Valiant also shares his name with Arthurian comic strip hero Prince Valiant, who wields a singing sword, Flamberge.