At the beginning of the film, Akira's perfectly dry body has been captured jumping off a small island in the middle of a lake. How did she reach the island without getting wet?
In the entry scene of Akira, she starts undressing to perform the jump as a part of the bet .She is wearing a sleeveless top and she removes it. But just as she is about to remove her track lower, we can see silver colored sleeves of a top which obviously she wasn't wearing.
In a flashback scene, Meera is shown as a British child with fair skin and light colored hair praying in the church. It might have been deliberate to show that in real life Meera is from a British descent; however unless she was adopted, in the film it doesn't make sense how she is a White-British but both of her parents are Indians.
Aafter a leap of 10 years, Shahrukh looks different with a beard but Katrina looks the same. Meanwhile, Katrina and Anushka look the same age but there is an gap of 10 years between them.
Samar gets into the Indian army after the age of 25. The Indian army does not hire after the age of 25.
According to Indian Army rules soldiers can't grow a beard, but Samar Anand ('Shahrukh Khan') is shown with a full beard.
During the song 'Challa', we see the lead actor dancing around a place which has the 5 rings of the Olympic Games. This scene is supposed to have happened in 2002, which wouldn't explain the presence of the emblem.
When Samar (Shahrukh Khan) and Meera (Katrina Kaif ) are waiting for a train in Charing Cross station, the announcement when the train arrives says that the train is going to Stanmore. The only London Underground train that goes to Stanmore is the Jubilee line, and this does not pass through Charing Cross station.
While documentary filmmakers are allowed for projects with the Army in Kashmir after consideration by the government, they have to wear safety gear like regular personnel and civilians are restricted from operational areas. Anushka Sharma roams about in the mine infested site in casual wear and Katrina Kaif at the end of the film is let into the disposal site.
After visiting Meera's mum, Samar brings cups of coffee for Meera and himself. It is evident as Samar throws the cups in both how he his holding them and how they land upside down that both cups were completely empty.
In a scene Anushka was seen standing in an rock surrounded by sea but what shocked us more that how she reached there without any dropped of water.
Meera's family owns a Rolls Royce Phantom and Buggati Veyron in 2002. However, the Phantom was launched in 2003 and Veyron in 2005.
When at the Tube station, after the "Ishq Shava" song, an Intel Ultrabook advertisement board could be seen behind Samar. Intel Ultrabooks were launched in 2011, so could not be there in 2002.
In a scene taking place during Samar and Meera's romance in 2002, a Mercedes Benz S-Class is parked outside Meera's house. However, that S-Class model was not available until 2007.
The Olympic rings are visible in a London railway station. The scene is set in 2002 but the Olympics were held in London in 2012, concurrent to filming, and the bid was not even decided until 2005.
When Samar and Meera are dancing to 'Saans' in 2002, the police car is shown to have LED light bars. In 2002, the police cars in London still used halogen, rotating/spinning bulbs. LEDs were not in common use by London police cars, until 2011.
Anushka has never seen Katrina before, nor her Pict in Srk's diary, yet she recognizes her at once.
The Indian Army isn't informed after Samar's accident, nor do they try to contact him or Akira.
In the film, the British police is shown allowing a member of the public near an armed bomb, with the justification that he might know what he's talking about, but he could be the person who planted the bomb in the first place.
When Akira films Samar singing the Challa song by the river, she is using a small hand held camera and is standing far off. Between the distance and the poor microphone and the rushing sounds of the water, the audio of his voice would have been very muted if it was able to be captured at all.