jfe:
Your "technical" approach will not succeed. He can find (and show to his boss) articles that Linux is "dangerous". Microsoft, others will feed him ...
In my "first live" I sold computers. I remember that all hardware and software contracts hat a language something like this: "..this software (hardware), like any other, has/may have "bugs" .. we try to fix it.. however, no guaranties..."

Find this paragraph and send it to your boss...
Good luck.

BTW, the SCO attack is NOT helping you:

...."SCO is nothing beside the threat that the Open Source developers face from software patents, a fight that we are losing badly," Perens warned.

He singled-out IBM, a Linux stalwart and the primary subject of SCO's action, for pursuing a "pro-software patent agenda". The company is renowned for maintaining a massive patent library.

"None of our company partners other than Red Hat have even given us any assurance that we are safe from their own patents... I'd sleep a lot better if I could see something on paper that spells out just what sort of armistice we have."

http://www.cbronline.com/todaysnews/...256d7f0018bbbe

...SCO Group Inc is preparing to invoice customers running or developing with Linux, while broadening its copyright net to include manufacturers of embedded systems...
http://www.cbronline.com/latestnews/...256d7f0018bb99