The (Mis)Education of Liam Fergus Beircheart Gallagher - S8-E5
Visible crew/equipment: When Carl and Ian are jogging, there are several shots straight on of them. A few times the van filming the scene is reflected in the windows of the shops.
The Legend of Bonnie and Carl - S4-E9
Visible crew/equipment: The cameraman is visible whilst sitting in a chair in the office scene where Fiona is walking away.
Familia Supra Gallegorious Omnia! - S6-E12
Continuity mistake: Frank's bruise on his left eye (a black eye) grows larger when he tries to get the man on the forklift's attention. Earlier in the episode the bruise is smaller. Later in the episode the bruise returns to the same size it was before.
I'll Light a Candle for You Every Day - S2-E3
Continuity mistake: In season 1, when Ian is looking for Mickey, Mandy mentions that Mickey went to take their mum out of jail. After, it is mentioned 2-3 times that their mum is dead. Mandy also specifies to Lip in season 2 that she's been dead since she was a baby.
May I Trim Your Hedges? - S3-E3
Continuity mistake: Kevin divorces his first wife in Season 3, Episode 3. But in Season 10, Episode 12, he tells Veronica that he will have to find her first to get a divorce before he can marry V.
Character mistake: When Fiona and Ford are lying on the mattress looking up at the compass on the ceiling, the compass is improperly painted. With west on the left, north would be at the top, not the bottom as depicted.
Character mistake: Iain and Mickey tell paramedics about an old lady needing immediate help in her apartment on the "5th floor" just before stealing their ambulance as the paramedics storm into the building. However, the apartment building has lots of units on every floor and no unit # was given in this fairly large building. Medics would have trouble finding her had this been a real call.
Factual error: Karen says she doesn't want to divorce Jody because he'll take half her life insurance payout in the divorce, but life insurance (as well as other inheritances) are not considered marital property and don't usually get divided in a divorce.
Familia Supra Gallegorious Omnia! - S6-E12
Continuity mistake: The baby has feces on its backside which the doctor talks to Deb about. It disappears during the scene and never reappears. No diaper was changed.
Be a Good Boy. Come for Grandma - S6-E8
Continuity mistake: The sign on the door "Carl's Crib" gets bumped and is off kilter near the beginning of the episode. When Carl's friend shows up, the sign rights itself.
Deliberate mistake: When Dominique is creating a Tinder profile for Fiona (an app Fiona admits she doesn't use), she manages to use Fiona's phone to take a picture of her, create a profile, and quickly get three matches, all within a span of 25 seconds. Downloading the app itself would take longer than 25 seconds, much less agreeing to its terms of service, and verifying the email or phone number associated with the account. (00:45:15 - 00:45:39)