Big B is in no mood to reconcile with Aamir Khan

It is seen that Amitabh Bacchan has been carefully avoiding Aamir Khan because of the comments on the sexagenarian actor's Black.
Recently both the actors were shooting in the same studio and did not even bother to say a Hi to each other. On top of it, they waited for the other to leave the studio so that they don't bump into each other.
But on the contrary, in Taare Zameen Par Aamir Khan who is playing an art teacher's role praises Abhishek Bacchan as a hottest star in the country.
Also for taking Abhishek Bacchan's example in Taare Zameen Par Aamir Khan took permission from Amitabh Bacchan.
If this is true then why don't Amitabh Bacchan give a cold shoulder to Aamir Khan or there is some another cold war between the two?