Corrected entry: The Spanish subtitles for this show are laughably bad. Across the first seven seasons, the subtitles routinely mistranslate what the actors are saying. In the worst cases, they omit whole sentences. Many times, they use words that don't exist in any Spanish dictionary.
The One In Barbados, part 1 - S9-E23
Corrected entry: When they arrive in Barbados, Monica and Phoebe take a seat while Chandler and David check in. Rachel is there alone, yet she doesn't check in, she takes a seat with Monica and Phoebe.
Correction: That just means Rachel didn't check in right away. Sometimes people hope the line will get shorter and do something other than wait in line during that time.
The One Where Dr. Ramoray Dies - S2-E18
Corrected entry: When Rachel and Monica were arguing over who got the condom, couldn't they have just gone to Chandler's apartment to get an extra one? Knowing Chandler, he would always have a few spare.
Correction: Character decision, not a writing/continuity error.
The One with the Fake Monica - S1-E21
Corrected entry: After Ross chides Marcel for humping the lamp, in the next shot, you can see Marcel come out from the hallway leading to the closet. He was obviously released from back there by the handlers for that particular shot. (00:00:40)
Corrected entry: The whole plot line of Rachel getting off the plane is most definitely impossible in post-9/11 America. Regulations consider any passengers that get off the plane after they've boarded to be security risks. When Phoebe gets Rachel talking about something wrong with the plane, causing panic, all those panicked passengers would have been stopped, and Rachel likely would have been questioned for the suspicious nature of that phone conversation. Likewise, when Rachel goes running off the plane, she at best would have been forcibly stopped and questioned, and at worst would have been shot, like the mentally ill guy in Miami in early 2006.
Correction: It isn't just Rachel, almost all of the passengers begin to complain, we are not shown them actually leaving the plane, so we would expect that the crew would see that nobody at all was compfortable to fly.
The One With Rachel's Other Sister - S9-E8
Corrected entry: When Phoebe is teaching Joey how to lie, look carefully at the plates on the table behind her. There are three plates, the next time you see them they all have napkins on them, then in the next shot (with the plates) only the one closest to the camera has a napkin on it. Also this plate is one of Monica's good plates, yet when Joey sits down later, it is a red plate.
The One With All The Resolutions - S5-E11
Corrected entry: Phoebe states "I don't know the actual names of the chords" when teaching Joey how to play the guitar, but in 'The One With the Baby on the Bus' (Series 2) Phoebe names several of the chords which she can play on the guitar.
The One Where the Monkey Gets Away - S1-E19
Corrected entry: When Chandler and Joey are talking to the girls in towels you can see the apartment number is 5 but when Monica and Phoebe are talking to Mr Heckles his apartment number is also 5.
The One After Joey And Rachel Kiss - S10-E1
Corrected entry: When Ross walks into Monica and Chandler's hotel room, he is packed much earlier than both Monica and Chandler. However, in the episode after Monica and Chandler get married, Ross only signs out of the hotel a few minutes before check-out time. This is also implied by other characters who say that he does that all the time.
Correction: Being packed doesn't mean he will check out immediately.
The One With Phoebe's Birthday Dinner - S9-E5
Corrected entry: When the waiter is ushering Phoebe onto a smaller table, he has his hands on Joey's chair, but when the shot changes, his hands are suddenly directing her to the new table.
The One Without The Ski Trip - S3-E17
Corrected entry: Surely Triple A could just locate the payphone that Phoebe was using to know where she was?
Correction: At the time this show aired, caller ID wasn't as wide spread as it is now, however even if they did have caller ID most pay phones come up blocked or private anyway. Even if they did have the number it won't give them the exact location - they aren't the police, so they just can't put a trace on a phone call.
The One With Phoebe's Wedding - S10-E12
Corrected entry: Just after Monica tells Phoebe to be at the rehearsal dinner at 18h00 her phone rings and she answers it "Gellar here". She has been married to Chandler since season 7, surely she means "Bing."
Correction: Completely in line with Monica's character that she would continue to refer to herself by her maiden name or alternatively a completely plausible character mistake. Monica also states that she never changed her name in a later episode. (The One With Princess Consuela).
The One With Phoebe's Cookies - S7-E3
Corrected entry: Surely as Monica is really organised and tidy, she would have labelled each batch of cookies as she made them?
Correction: Character decision, not a mistake.
The One with the Fake Monica - S1-E21
Corrected entry: In the scene where Monica returns home with the $20,000 check, after Chandler reveals it is real Rachel remarks "I can't believe this is a real $40,000 check."
The One Where Ross Finds Out - S2-E7
Corrected entry: When Rachel tries to open the door of Central Perk, the bottom lock blocks the door. But when Rachel closed the door seconds before she never shut the bottom lock. (00:18:50 - 00:19:45)
The One with the East German Laundry Detergent - S1-E5
Corrected entry: In the last scene of the episode when the friends are sitting on the sofa in Central Perk, Ross has the ice on his forehead because he hit it on the machine in the launderette. At first Rachel is holding it on Ross' head, then in another shot Ross is holding it, then Rachel again, and then in the final shot Ross is holding it. It may be that they did keep switching but it's unlikely and looks more like the scene was filmed twice and the mistake was made when it was edited.
Correction: Actually if you watch them all the time you can actually see them switch hands so there is no mistake.
The One with the Dozen Lasagnas - S1-E12
Corrected entry: Monica has to get rid of the lasagnes because they contain meat. However, when Rachel comes back into the apartment after dumping Paolo, Phoebe is eating a lasagne with Monica, even though she is vegetarian.
Corrected entry: Even in the shows filmed after 2001, you can still see the World Trade Center in certain shots. The producers used a lot of the same footage throughout the whole series.
Correction: No, Only the episodes shot prior to September 11, 2001 have the WTC in them. Thus explaining why some of the episodes from that season have them. They are absent for the last few seasons.
Corrected entry: Throughout the series, the central perk sign in the coffee shop reads the correct way round when they're inside the coffee shop, but in scenes outside the coffe shop the sign still reads the correct way.
Correction: It's supposed to. It's painted on both sides of the window. The logo is thick enough that you don't see through it.
The One With Chandler's Dad - S7-E22
Corrected entry: When Rachel and Ross are pulled over by the Cop on the freeway, the Cop states that Rachel's starsign is Aquarius, based on her driving licence details. However, in series 4, 'The One With Joey's New Girlfriend', she tells Gunther that her birthday is May 5th. That would make her starsign Taurus.
Correction: This has already been submitted and corrected. The cop could easily have got it wrong, and Rachel is hardly going to correct him, since she's trying to flirt her way out of a speeding ticket.
Correction: Spanish subtitles don't count as mistakes for the show. It's the fault of the subtitlers used for that particular foreign release, not of the "Friends" production crew.