I just purchased Toast 10 Titanium with the HD plugin mainly for burning Blu-ray DVDs or High Definition DVDs or whatever the proper terminology is for use on set top Blu-ray players. I've burned 6 different discs now trying different settings and my Samsung BD-P1500 won't play a single one. My player's firmware is up-to-date, I've tried several different brands of blank media, I've tried different codec and image size exports from Final Cut Pro to no avail. I have no problems with the player when using commercial Blu-ray discs.
My workflow is to export an HD project from FCP as a self-contained QuickTime movie, drag that movie to Toast 10, choose Blu-ray Video (Auto Play, Play All Items, Automatic Encoding, Best Video Quality), select DVD disc type and click the red burn button. The video encodes and the disc burns. However, no playback on the BD player.