\pdfmajorversion

[Akira Kakuto]

> Yes, one can set it there (though if you set it above 2, the PDF doesn't  
> show the value ...)

I think that non-existing version numbers should not be allowed.
If I set a non-existing version number, [x]dvipdfmx by Hirata-san resets it to a DEFAULT value.

Thanks,
Akira