I heart ny - S4-E18
Continuity mistake: When the horse drawn buggy is pulling over to the curb in front of the hospital, you can see it dodging traffic and cars. But after Carrie leaves and the buggy pulls away with only Mr. Big, suddenly there are no cars or traffic in sight. The entire street from that direction appears to be completely empty. (00:22:50)

Oh come, all ye faithful - S1-E12
Continuity mistake: When the psychic is about to crack an egg, the cigar changes positions between shots. The ash also changes colour.
Continuity mistake: Jarred shows up at the bar and puts his left arm akimbo. A shot later it's lowered.
Continuity mistake: Stanford is given a drink and raises his glass towards his mouth. A shot later it's at chest level. (00:08:52)
An american girl in paris (part deux) - S6-E20
Continuity mistake: When Carrie tells Big she misses New York, his hand suddenly appears over her cheek.

An american girl in paris (part deux) - S6-E20
Continuity mistake: Juliette says the restaurant used to be better while holidng her glass close to the table. A shot later it's close to her face and the grip has also changed.

An american girl in paris (part deux) - S6-E20
Continuity mistake: In the pastry shop, the dog is sitting by the edge of the chair. A shot later, a big part of the chair is visible.

The post-it always sticks twice - S6-E7
Continuity mistake: Charlotte puts her hand on Sam's to show her her ring. The position of Sam's hand changes between shots.
Continuity mistake: During The baby shower Samantha grabs the third baby pajama, but from the opposite angle her hand is empty and she is grabbing it again.

Continuity mistake: In the shower, Aidan's slick hair swaps to messed up in a split second. Water couldn't have done it and neither could he, for his hands were busy soaping his body.
Continuity mistake: Aidan gets in the shower and raises his left arm. A shot later it's lowered.

Continuity mistake: In the cabin, when Big goes to sleep his brushed hair suddenly becomes completely messed up.

My motherboard, my self - S4-E8
Continuity mistake: After Carrie is told that her computer is wasted, she is home looking at the phone, which is facing the keys. A shot later it has turned 180ยบ around.

My motherboard, my self - S4-E8
Continuity mistake: When Sam is about to have an orgasm, his lover's hand is on her arm in one shot, but lowered and then reaching for the back in the following shot.

My motherboard, my self - S4-E8
Continuity mistake: When Sam is about to have an orgasm her hair is behind her shoulder in one shot, or over her collarbone in another.

Continuity mistake: When Aidan is cooking, two set lights are reflected on the cupboard.
An american girl in paris (part deux) - S6-E20
Continuity mistake: In the first shot of the diner as the girls are waiting for Carrie to arrive, the baby photo of Charlotte's daughter is not visible on the table. When Carrie comes in, there is a clear shot of the entire table, and the baby photo is still nowhere in sight. But in the shot where Carrie sits down at the table with the girls, the baby photo is suddenly sitting upright on the table near Charlotte, and fully visible. There was no time for this to happen, as they are just sitting down. Carrie is still hugging her friends (Charlotte) at the table. (00:41:40)
Suggested correction: The scene doesn't take place in real time. When they hug each other at the door the food has not been served. After the hugging it cuts to all four seated and the breakfast already on the plates, with the picture in sight. Therefore, they had plenty of time to see the menu, order, wait for their food and, of course, place the picture on the table.
Continuity mistake: When Charlotte and Trey are in bed together, Trey suddenly sits up and is about two feet away from Charlotte as he says, 'Darling, I'm juicy now.' But in the very next shot, Trey is suddenly leaning back down and much closer to Charlotte, only inches from her face. No time has passed in between these two shots. (00:03:15)
Lights, camera, relationship - S6-E5
Continuity mistake: When Charlotte and Anthony are talking on the park bench, Charlotte is looking at Anthony to her right as she says "No next, it doesn't work like that". She then turns her head back to face forward, when she is through speaking. But the very next shot, Charlotte has her head turned towards the right, and is facing Anthony again. (00:10:20)