After a year or so of video and audio stuttering with several Tivo High definition recorders ( all HR10-250) I have noticed the following: 1. The video and audio stuttering occurs on OTA and Direct TV high definition channels. Neither OTA or Satellite is any better or worse with this problem 2. HDMI and Component are the same with this issue. Both have the stuttering issues 3. CBS, FOX, HBO and Discovery HD appear to have the least amount of video and audio stuttering. ABC, NBC, and ESPN HD are the worst, both OTA and on Satellite (West Coast Feed). 4. Live sporting events seem to have the stuttering more than prerecorded television shows. The above observations would lead one to believe the problem is most likely a broadcast issue rather than a problem with the signal or receiver. It would be helpful to hear from others especially in the Los Angeles area, to see if you have had the same experience. If many in the LA area have the same pattern regarding ABC, NBC, ESPN HD issues being the worst, it would certainly point to broadcast issues. If this is not a general pattern in the Los Angeles area, then who knows what the cause of this problem is . . .