Oracle 7 client - 9i database

[waitecj]

We are currently using Oracle7 client to connect to 8.1.7 database. We are going to upgrade the database server to 9i and I want to convince our software vendor we need to upgrade the clients too (they say their product is only certified on v7 client). Therefore I need some ammo to show them that Oracle 7 client won't connect to a 9i database (which I heard somewhere on this website a few months back (ORA-3113 I think)).

I can find loads of info at Oracle telling me that the client\database matrix I am looking for isn't certified (207303.1), but I can't find anything to say that it actually doesn't work!! Now I know what you are going to say... If it isn't certified, then who cares if it does or doesn't work, just don't use it. I have been saying that for months, but you know how these developers are...

Cue Mr Hanky...

Does anyone know of any links to hard evidence that this doesn't work?