At the start of the Christmas specials, writing comes up to say that the first series was filmed in Jan 2001. But in episode 6, Keith says "It's the end of the financial year!" which would indicate some time in July. As each episode only follows a single day, these days would need to be spaced quite far apart for this to work, which makes no sense. [When the financial year starts and finishes is up to the individual company; there's no legally mandated year end. To end in July would be somewhat surprising; few companies would choose to start their new financial year at a point when many employees would be going on holiday. Finishing in January or February would not be at all unusual.] Corrected by Tailkinker

When David is playing the guitar during the training session he said that he only plays stuff that he has written himself, yet later in the episode when he is comforting Dawn he plays 'Every Breath You Take' by the Police. [He meant that his band only played original songs, not that he personally could never play songs written by other people.] Corrected by Moose

When David and Dawn are talking at the reception desk, you can see Gareth and Tim talking in the background. Yet a few shots later, Gareth is arriving at work for the first time carrying his suitcase and newspaper. [The show is supposed to be a documentary. The shot in which David explains that he has worked at Wernham Hogg for 8 years then introduces Dawn to the crew/ audience, would probably be used before a shot introducing two new characters the audience hadn't 'met' yet. This can be put down to an editorial decision by the (fictional) documentary makers, not the 'real' editors.]

On the main menu of series 1 wait a view minutes until you hear the phone ringing then press enter. You will have to find out yourself what happens... [Nothing happens. The person who submitted this one is having a laugh.]

As Lee is walking in to give Dawn her sandwich you can see somebody running towards the camera down the corridor behind them but this person isn't a character and doesn't appear in shot after this scene. [Remember that the idea of The Office is that, as far as the characters are concerned, it's a reality show about their office life. Given this, it wouldn't be unusual for someone to be walking around in the corridor who wasn't a regular in the office itself.] Corrected by Moose

When Brent is giving his business talk, he throws his hat at Dawn. It hits her in the chest/neck area, but she clutches her forehead. [How is this a mistake? Since this was actually real unedited and untreated footage, it has to be put down to a character's decision to move her hands out of the way, not a mistake.]

Lee and Dawn overstay their tourist visa in the US, then fly back to the UK for the Office Christmas party. They then get into a taxi to go out to the airport in order to return to the US. They're kidding themselves. As I know (to my cost) when you overstay a tourist visa, the US Immigration Service finds out when you check in at the airport on departure. They'll be refused reentry, and probably barred from entering the US for up to six years. (I got a three year ban.) Neither Lee nor Dawn could possibly be unaware of this nor think they could beat the system as they would have been arrested when they checked in in Florida on departure (as I was), and they would have remained in small holding cells until the paperwork banning their return had been processed and their passports stamped 'Invalid for U.S. entry', as mine was. (All this takes about seventy two hours, so they'd have missed the Christmas party anyway.) [This issue is dealt with in a back-handed way in Part 1. Dawn acknowledges that they would have a problem getiing out of the US, then an off-camera voice (presumably one of the BBC filmmakers) says something to the effect of: "What if we could help you with that?" The impliction was that they could use some journalistic back-channels to sneak Dawn and Lee back to the UK. Whether or not this would be successful, espcially in the uber-security-conscious climate of today, I don't know, but it's certainly plausible in context.]

As revealed in the DVD commentary, many shots show the trees and bushes in full bloom despite the fact it's Christmas. Most notable is the tree outside the pub window in Brent's second date and the bushes outside Brent's window when he's driving around in the daytime. [This cannot be classed as a mistake in a factual error if they admit it in the DVD commentary, this is not a mistake that has been found.]