"Note: The update patch 4617a only supports Blu-ray playback.
Note: After Toshiba made their announcement that it will no longer develop, manufacture and market HD DVD format discs and the fact that there will be limited new title releases in HD DVD format, CyberLink has decided to remove HD DVD support from PowerDVD Software. "
So basically the patch has downgraded the software, I don't know where I stand on the trade descriptions act with this as the main product was sold with HD DVD support...now it seems I've lost that. So what now....I have a large number of HD DVD's that I can't view any more......argh!!