Ranbir Kapoor and Katrina Kaif, has sent the box office cash registers ringing, elbowing out Madhur Bhandarkar's has got a terrific initial thanks to the star cast but it will suffer on the content part. While has had a very slow opening...that of only around 20 percent. Shelf life for both movies is only limited till Monday," Joginder Mahajan, a Delhi-based distributor told IANS. has been co-prod