[Vwdiesel] '01 Golf TDi binding rear brake

[Rolf Pechukas]

hey all
update to a previous problem
I had a binding rear driver's side brake that ended up wearing thru  
the pad and metal on  metal scoring the disc
replaced pads couple weeks ago and everything seemed fine
but I now realize that brakes are still binding somewhat - wheel gets  
hot on long rides
Q: what would cause caliper NOT to retract when brake pedal is  
released? what's supposed to separat pads?
thanks
- Rolf in MA