When Sid is boarding a rickshaw after his interview, there is a young man (wearing a black AC/DC T-shirt) talking on his cell phone who starts walking in the opposite direction. Sid turns around and runs towards Aisha and embraces her from behind. When the camera pans closer on Sid and Aisha, this same man is again seen in his original position.
After the water fight between Sid and Aisha, the back of Sid's shirt is slightly wet, but in the next scene it becomes completely dry.
When Debbie offers to pay for Sid's food in the restaurant , she states that she was unable to get admission in college 3 years back because of Sid, but she also says that she has got the job. Given that she was in the same college as Sid, and graduated with him (it takes at least 3 years to complete degree in India to get a job) , the story she is telling about not getting admission can not be true.
The main story is running in the time period of April and May 2008, but when Sid gets the first email from Aisha, the email date is of March 9, 2009