When Hrithik Roshan receives a letter from his friend while in Kargil and is interrupted by his fellow senior officer, he puts the letter in his right pant pocket, but when he remembers about the letter later on, he removes the letter from his left pant pocket.
At 2:46:06, Karan is shown rock climbing with two trailing ropes loosely entangled. When the point of view changes to an overhead camera, the ropes are clearly far from being tangled.
In general, the combat scenes show highly unprofessional attitudes and behaviors by the actors performing as soldiers. The way they move in the field, the careless way they carry their weapons, etc. The producers seem not having had any military advice.
Also, the Pakistani soldiers are portrayed as a bunch of bandits, when they actually are a very professional army.