Not exactly the same problem, but close. Check your window tracks for debris or bent weatherstriping. I took a brick through my drivers window shortly after I bought mine. The force badly damaged the inner-workings to where it had to be replaced with the glass. It actually snapped that plastic clip off of the regulator. When repaired, it didn't work cleanly and would often make a popping sound when closing as if something was out of allignment. I eventually found a small chip of glass in the track, once removed it was fine.