Since buying my new IDTV (Toshiba 28ZT29B) I've noticed that, on occasions the sound isn't in sync with the picture. Last night, for example, it was very noticable on Channel 4. However, changing to another channel (BBC1) the sound sync was fine. This would suggest to me that the problem is transmission related as opposed to the receiver. Is this just a quirk that you get with Digital Transmissions (maybe if the signal's not that good), or could there be a problem with my digital receiver? Thanks.