I have had this problem for years on each of my Cablevision SA 8300HD dvrs. I decided to try and determine if there is a setting to change the behavior. When I hit the ff button during playback, the dvr randomly chooses the ff speed. Is there a way to force it to select one of the speeds all the time or, at a minimum, choose the slowest speed all the time? It is really frustrating when it chooses the fastest speed and bolts well past the end of commercials.