Aaaah... it's WORSE!
"When an Autoopen file has been detected and the user has confirmed
that the file indicated in the Autoopen file should be opened then the
file indicated in the Autoopen file MUST be opened in the application
normally preferred by the user for files of its kind UNLESS the user
instructed otherwise."
BAD! WRONG! EVIL! RUDE! SKANKY!
"When an Autoopen file has been detected and the user has confirmed
that the file indicated in the Autoopen file should be opened then the
file indicated in the Autoopen file MUST NOT be opened in the
application normally preferred by the user for files of its kind UNLESS
the application is registered as being permitted to open untrusted
files OR the user has instructed otherwise."
That's better.