You will get a clue if you look into how the breakup story of Salman and Katrina took its shape. It all started once Salman's television show Dus Ka Dum promotions hit the small screens and it reached its peak when the show was about to start. It has died down a bit now that the show has started. Katrina's comments that she might appear on the show has given a hint that they might be still together.
But if publicity is all what the couple wants, then the rumours may continue to flow out because Katrina's film New York is scheduled for release this month.
Maybe these lovebirds have decided to use their love life for publicity instead of speaking to journos.