Not much chance there's any error on the DVD making process. I'm pretty versed in the creation of DVD's. It was that experience that led to the GetGray calibration DVD. From something completely unrelated, I'm had to make hundreds of DVDs for others. I learned early on what it took to be compatible. I use a particular NEC burner for writing. I use a different drive for reading. Drives that read-write are on different busses, I use Taiyo Yuden high end media, and burn at medium-low speeds (4x). In hundreds of DVD's made and sent to strangers with everything from $20 Apex players, to high end Denon's, I just don't get any player incompatibility. But that's not to say the Samsung BR couldn't be the first. So I tried a different brand (Verbatim -R) and redownloaded the image. There is no checksum avail, but it unzips without issue and all indications are that the iso is fine. It's a small burn, nothing on the more problematic perimeter of the DVD. The image looks fine, no sign of a bad burn. So it appears that it is probably the player.
If your region is the same, what about the FW version? What is your's? Sure seems odd one woudl do it and another not. Also I saw on Samsungs site several models of the 1400 listed. (A,C,C IIRC). Mine is a "plain" BR-P1400. Your's?