At the end of the film, text states that to this day nobody knows how old Wiseau is, where he is from or how he made so much money. In actuality, his naturalization records can be found online that show he was born in Poland on October 3, 1955 and became a naturalized U.S. citizen in 1984 in San Francisco. According to Sestero, he moved to France before immigrating to the United States and changing his name to Thomas Pierre Wiseau (likely from Tomasz Piotr Wieczorkiewicz or Wieczór). Furthermore, a documentary filmmaker discovered he was born in Poznan, Poland. However, it remains a mystery as Wiseau will not confirm these details, and how he became so wealthy is still not known.
The infamous rooftop scene actually took 32 takes to get right; not a deliberate 67 takes in Franco's version.
Early in the movie late 1998/early 1999 Greg and Amber are watching Gilmore Girls, but Gilmore Girls didn't debut until October 2000.
During the film's premiere, scenes from The Room are shown out of order. Specifically, the "You are tearing me apart, Lisa!" scene is shown before the rooftop "I did not" scene, when in actuality it is the other way around.
Early in the moving when Tommy and Greg are in the car together laughing, Tommy calls him Dave. This is the name of the actor, not the character.
James Franco, who has brown eyes, wore colored contacts to more closely resemble Wiseau; however, in some early scenes such as the cafe, Franco is not wearing colored contacts.
In a restaurant scene, there is a Coca-Cola umbrella with a more recent Coke bottle design on the umbrella. This scene takes place in 1999.
Between cuts once Tommy and Greg are in front of the screen at the premier, Tommy's sunglasses move from being on his head to on his face.
The scene in which a star-struck Tommy approaches Judd Apatow in a restaurant takes place in 2002, when it is highly unlikely that Tommy would have recognized him. Apatow had produced the shows Freaks & Geeks (2000) and Undeclared (2001), but did not achieve celebrity status until he directed The 40 Year-Old Virgin (2005) and Knocked Up (2007). However, as Apatow is never identified by name, it could be argued he's playing a fictional producer and not himself, especially as he's much nastier than the real Apatow.
The production sound mixer on set had a pair of black Audio-Technica ATH-M50 headphones. Those headphones did not exist during the early 2000s.
Ready to Rumble poster visible in a 1998 scene. This film came out in 2000; even in a studio, a poster of it wouldn't exist at this time.
The entire film takes place in the late 90s/early 2000s, but a Jack in the Box restaurant can be scene with the modern logo/signage, which was introduced in 2009.
Post-2003 cars sporadically drive in the background.
The rooftop view from Tommy's apartment is looking southwest to downtown Los Angeles (indicating a view from Echo Park) when seen at night. Later in the film when Tommy is on his roof during the day, the background is looking southeast over Hollywood (indicating that his apartment is now located near Runyon Canyon).
The woman in the flower shop appears way younger than the one used in the actual 2003 Room; she was portrayed as an elder.
In the "tearing me apart" scene, Tommy raises his arms and freezes them too soon as he delivers his line - inconsistent in contrast with the 2003 version of "The Room".