I dont read them on net but I noticed few.

Kaal.
They determine that ajay is ghost when he was invisible in camera but if you think camera's lens can see way better than human eye so shouldn't he be visible in camera?

Maine Pyaar Kyun Kiya.
When salman go to dubai and after that song when katrina was standing near the pool, sohail givers her hat. and she says 'Pyaare ne di' but when salman throws hat in pool she says 'Yeh shooting ki hat thi', she changes mind too quickly.

Dilwale Dulhaniya Le Jayenge.
When Kajol goto punjab without telling srk, he says 'Main Aa Raha Hoon Simran' per kahan ?? Where do he go did she left address on the door ?? Punjab is way too big to find one person.

thats all can rem now but there lots more that I noticed if I rem them I will post.