I have 2 TiVO HD DVR's, each connected to an HDTV by HDMI. I would like to use the Amazon Instant Video service, and would like to rent HD video that is available on that service. But each time I try on either TiVO HD, I get the message "This device cannot support the format requested". According to Amazon Instant Video FAQ, the TiVO HD or any Series 3 TiVO should support HD video downloads. I can't any information on this by Googling this phrase, the Amazon site, or this site (a couple of mentions of this, but no solution I could find). Netflix HD downloads are no problem. I also have no problem with iTune HD downloads through my AppleTV. Does anybody know what the deal is here? Won't the TiVo HD work with Amazon Instant Video HD downloads? Or is there a fix for this?