I don't know whether to complain to CBS, WFMY, or Time-Warner. Last night I started watching CSI-Miami in HiDef. It was a beautiful, crisp picture; but every 30 seconds something disturbed the picture! An artifact would pop up in the middle, or brief bar across the bottom, or black screen for a second. After 8 minutes we had to swap to the SD broadcast. Has anyone else had this problem, or did anyone else around Winston-Salem, NC, have the same experience last night???