I am a recent user of the HDUI, so forgive this question- is that a new behavior? Audio dropouts while switching from the TiVo menus to live (or the other way around) wouldn't seem all that unusual to me (since it is such a major change). HOWEVER, when going in and out of the new HDUI guide, there is no audio interruption, and it is pretty fast too. But I cannot confirm your observation about audio dropping out when moving from one HD HDUI screen to another HD HDUI screen/menu. I tried everything I could, and never had any audio dropouts. Does anyone else have any audio dropouts at the exact time of changing from from HD HDUI screen to another?