Well, I just watched the Boulevard release of
Kraken/
Deadly Water and it reveals itself at the end of the film. When the film is over, the disk defaults to a Top Menu easily recognisable from a Panasonic DVD recorder - complete with information about which AV channel of the machine they used, on what day and at what time!
As a proud owner and frequent user of a Panasonic DVD recorder, I can assure you that Panasonic's firmwares/hardware they have a tendency to be a bit finicky and vague about aspect ratio flagging; varying according to input signal and even what kind of blank media is used to record onto.
If Boulevard used a domestic Panasonic DVD recorder for their master, no wonder it confuses different machines using different interface protocols!
