Update:

Currently I am trying that two buttons receive touch event at the same time. But only one button receives the event.

Now if I place the buttons on a QFrame, they receive multitouch event but only for the first time, after that only one button receives touch event.
Here behavior is similar to post#2 by tihoulas.

I don't know what different happens when I place the buttons on QFrame. Any pointers would be helpful. Can some one point me to Nokia/Qt guys who might know about it?

Thanks