Priyanka Chopra
Aitraaz

Priyanka Chopra and Akshay Kumar meet on the beach in Cape Town, South Africa. After Priyanka has finished her swim and Akshay has finished jogging, they both walk back to their cars. Priyanka is driving a Mercedes and Akshay an Audi.
Priyanka suddenly announces that she has locked herself out of her car and the keys are still in the ignition.
Mujhe aitraaz hai -- I object! You can never lock yourself out of a Mercedes car because all models of Mercedes cars can only be locked with a key from the outside.

When Priyanka Chopra forcibly tries to make love to Akshay Kumar, she leaves scratch marks on the front of his body. In the first scene, these scratch marks are shown on the upper right portion of his ribcage.
In the second scene, however, they are shown just below his ribcage. And then, in the third scene, when he removes his shirt in court, the scratch marks have moved up to his shoulder and also assumed an altogether different pattern.
A case of the "Traveling Scratch Marks?"

Harold and Kumar Go to White Castle

It is 2:30 a.m. when Harold and Kumar (Kal Penn) decide to drive off with the SUV owned by the five goons who have been taunting them. They drive the car off the freeway and bring it to a grinding halt at the edge of a cliff. All this time it is dark, since it is the middle of the night. They then spot their targeted restaurant at the foot of the hill, and Kumar decides to hang-glide down to the restaurant. All of a sudden, it turns day and there is bright sunshine.
When Harold and Kumar go inside the restaurant and run into Harold's work colleagues who are there with their dates, it turns to night again. The restaurant may be "White" Castle, but how convenient was it for the director to provide bright lights during the hang-gliding scenes!

Karam

When John (John Abraham) receives Shalini's (Priyanka Chopra) finger in the box, the severed finger has a nail painted in red. But in the scenes before and after the finger being cut off, Shalini is not wearing any nail polish.
I guess the editing people were being very generous in ignoring this flaw.

Kisna - The Warrior Poet

Towards the climax of the film, Kisna (Vivek Oberoi) gets shot by the evil prince who wants to marry Katherine (Antonia Bernath). Vivek is shown grimacing in pain and reeling over backwards, implying that the bullet has hit him in the back.
A few frames later, after his brother has saved him from the prince, Vivek gets up to hug his brother. When he does so, there is no indication at all that there is a bullet lodged in his back. This may be Subhash Gai's way of showing poetic justice, but what happened to the film's editing team?

Kal Ho Naa Ho

When Naina (Preity Zinta) and Rohit (Saif Ali Khan) are walking through the streets of Manhattan, they stop at a food vendor's stall, and Rohit asks the woman to give them two bagels. But she only gives them one, and we don't see Naina and Rohit paying for it. With customers like these, the vendor's future may well be 'Kal Ho Naa Ho'.

Dhoom

At the end of this film, in the chase scene, Jai (Abhishek Bachchan) shoots at the windshield of the getaway truck and Kabir (John Abraham) kicks its shattered glass off. Yet, there is one scene after this one where a close-up of the truck is shown and the windshield is still intact.
So much dhoom, but no effect?