When Katrina Kaif is introduced on the beach, Hrithik and Abhay Deol are sitting on the beach-bench. When Farhan comes, Abhay is sitting on the bench. Then in the next cut, Abhay Deol is lying down on his stomach on the bench. Then again in the next cut, Abhay is lying on his back on the bench. A series of these cuts show the continuity mistakes in that particular shot.
San Fermín (Bull Festival) happens mid July and Tomatina occurs at the end of August. But here Tomatina happens before San Fermín. Also, the trip was planned for a period of three weeks, therefore the trio could not have attended both of the festivals.
The festival sequence is off. The Running of the Bulls in Pamplona is in July, La Tomatina festival in Buñol is in August. Therefore, for sequential accuracy, the characters would've had to run with the bulls first, then participated in the Tomatina festival.
After Hrithik has remembered the reason for his failed relationship, his pink phone rings and it is shown that the call is from Joe(Work), but the cellular phone network shows Vodafone IN. He is depicted to be in Spain but the cellular network on his phone says India.