Front brakes dragginh

[Minven Wang <mwang@stern.nyu.edu>]

Hi!  I got my front brake pads changed last month at the Bruno's
Quattro Center.  But I felt the car is a little dragging, so last
week, I lefted the car.  When I set the shift to neutral, both
front wheels are a little dragging, seems the front brakes are always
on.  The rear wheels are OK, moving freely.  So it could be a faulty
master cylinder.  Calipers?  Bruno just installed a front right-side 
caliper (used parts from Bruno) when I changed the
pads.  Any suggestion on cause of the problem?  I always trusted
Bruno's mechanics and thought them should do a competent job.
Thanks.

Minven