It was earlier planned to release in late December 2008. The reason being cited by unit insiders is the Bachchan's long Unforgettable Tour which will be covering almost the entire globe and take months to complete.
There were certain corrections in the script made after the last schedule ended which had the participation of all its main cast.
Now these new sequences shall take time to be filmed as Abhishek is engaged with his first ever world tour.
A February 2009 end release, means Sonam Kapoor shall have absolutely no single release in 2008. Her Saawariya came in November 2007.
Now with Dilli 6 postponed and none other film of hers looking set to release in this year, her fans are definately going to be dissappointed with this long wait.
Reportedly, Amitabh Bachchan too is all set to join the Dilli 6 cast in a special appearance playing the role of his real life son, Abhishek's grand father in the film.