Continuity mistake: When Sheldon is putting his mittens on at the table he his seen putting the first one on and the second one is on the table, the shot changes and the mitten is no longer on the table. He raises his hands and both hands have mittens on them. (00:01:55)
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When we see Sheldon in bed at the start he's either flat on his back or on his side depending on the shot. (00:03:45)
Continuity mistake: When Sheldon and Missy are sitting at the table, Missy puts a paper in the basket in front of her. A couple of shots later when she says "sounds right" the paper has disappeared. In the next shot it reappears, in a different position than it was before. (00:06:20)
A Dog, a Squirrel, and a Fish Named Fish - S1-E20
Continuity mistake: When Pastor Jeff is talking about "Love Thy Neighbour," the Bible is open in his hands, apart from one shot where it closed. (00:13:20)
Summer Sausage, a Pocket Poncho, and Tony Danza - S1-E21
Continuity mistake: When Missy tries the Lobster for the 1st time, the way she holds her fork keeps changing between shots. (00:16:50)
Summer Sausage, a Pocket Poncho, and Tony Danza - S1-E21
Continuity mistake: When George Sr. is cracking the claw of the lobster, he goes from holding the cracker to holding a fork instantly. (00:16:38)
A Mother, a Child, and a Blue Man's Backside - S1-E18
Continuity mistake: When Sheldon is shown the M.I.T leaflet, the way it's displayed to him changes between shots. (00:09:20)
A Mother, a Child, and a Blue Man's Backside - S1-E18
Continuity mistake: When the guidance councillor holds up the leaflet for Caltec, where she holds it changes between front and rear camera angles. Note the distance from the top of the leaflet. (00:09:10)
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When Georgie meets Sheldon by the school lockers, he grabs his lunch bag from inside. From the opposite angle, he's taking it out again.
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When Mary lies in bed with Meemaw, the way Mary's right arm and hand lie on top of the left arm differs between shots. Check the way the hand covers the sleeve, for example.
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When Sheldon and Missy lie in bed together, her right hand is on top of her left. A shot later, it's the opposite way. (00:09:16)
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: During the spaghetti meal scene, the way Missy holds her fork changes between the back and front shots, especially during the last shots.
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: Sheldon pinches a loaf of bread, but a shot later he's pinching spaghetti. This changes back and forth a couple of times.
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When the family leaves the computer store, Missy's candy sucker swaps randomly between being in her mouth or not between one frame and the other.
Demons, Sunday School, and Prime Numbers - S1-E11
Continuity mistake: When Sheldon meets Ira, he is holding a pen which disappears a shot later.
Demons, Sunday School, and Prime Numbers - S1-E11
Continuity mistake: When Sheldon is in bed, he is holding the bible slightly upwards. A shot later, it's down, lying against the sheets.
An Eagle Feather, a String Bean, and an Eskimo - S1-E10
Continuity mistake: While the teachers are chatting, the PE teacher is grabbing his glass with the left hand. A shot later, the glass is suddenly on his right hand.
Jiu-Jitsu, Bubble Wrap, and Yoo-Hoo - S1-E17
Continuity mistake: When Sheldon is wrapping bubble wrap around his torso, it goes from neat to messy between long and close shots. (00:04:50)
Killer Asteroids, Oklahoma, and a Frizzy Hair Machine - S1-E16
Continuity mistake: At dinner, Missy says her day was fine until she learnt they can't afford cable. When she does, she has her fork over her green side bowl. When the shot changes, her fork is now over her main plate. (00:05:10)
Killer Asteroids, Oklahoma, and a Frizzy Hair Machine - S1-E16
Continuity mistake: When Sheldon grabs the school intercom, the principal has a piece of paper folded up out of the folder in his lap. When the shot changes, this piece of paper has disappeared as it should be visible in both shots. (00:04:00)
Answer: Some people just have a dislike for someone that can't be explained. Could be as simple as the way he's dressed.