The correct title of this episode is Burger War, this is evidenced on the public catalog of the US Copyright Office, Fox's official press release, and a shirt produced with the episode names on its back for the 100th episode. Many sources including iTunes call the episode Burger Wars.
Hugo was supposed to appear in this episode according to a promotional image, although it was likely from a scene cut for airtime. The possible deleted scene didn't appear on the DVD release of the first season.
The book Louise reads about voodoo in this episode is called "WhoDoVooDoo."
This episode was the least watched episode in Season 1, with only 4.00 million households tuning in to watch it. It was the lowest viewed of the entire show, until Beefsquatch took its place with 3.57 million households.
The episode received positive reviews from critics.
The flower vase Linda sets out on the counter disappears by the time Mr. Fishchoeder arrives at the restaurant.
Linda places a coffee down on the counter, presumably for Mr. Fischoeder to drink at the same time Bob serves him the burger, but it disappears following the close-up shot after she places it down.
Jimmy Pesto's hair that Louise cuts off keeps disappearing and reappearing on his head.
One of Pesto's burgers with an Italian flag decoration appears in a close up shot of Bob and Linda but doesn't appear elsewhere. Interestingly the burger appears in the aforementioned promo image that got deleted. Likely missed by the animation team after the scene got cut.
In some shots the buttons on Jimmy, Jr.'s vest are on the wrong side.