After several attempts, I finally got through to someone at Sony.

Hint: It would have been nice if you had disclosed the maker and
model number of the problem Blue-Ray drive. An amazing number
of problems can be fixed by firmware updates.

Had you read the original post, you would have known that the player indeed
had the latest firmware.

If it's of any interest... IJ&tKotCS plays fine, but "Starship Troopers"
will not play. And it's a Sony (ie, Columbia) disk.

I shut the player off and unplugged it. Who knows...