No no, it is nothing to do with the stars but with the workers of a local Irish production company who are part of the film's crew.
They held a demonstration over claims of poor pay and conditions during the shoot at Dublin's Ha'penny bridge on the North Quays.
And I thought yeh sab Mumbai main hota hai!
Apparently, local Irish papers have carried reports that the stars were perturbed by the protests as the workers tried to stop the filming.
Oh by the way, Irish papers are calling Salman and Katrina, Brad Pitt and Angelina Jolie of Indian movies. Hmmm...