Ian,As long as you buy the Contax equipment from a legit, dealer and get the International Wty, I don't see a problem.(stay away from grey market, i year dealer wtys,etc.) Why not contact Kyocera/Contax in Reading,Berks and ask them. If you need their phone/fax, I can give it to you.
While I think the above should be factual, I do know that Leica refused to honour their so called international wty. I purchased a new R6 from the largest Leica dealer in Germany and when I went to make a warranty claim here in Canada, I was denied. Although it was later sorted out(Leica changed distributors in the meantime), I was left dissatified and disillusioned. Letters to to both Germany and USA remain unanswered!! I sold all my Leica gear(3 bodies. 9 lenses, etc) (except my M6) and went over to Contax (after 25 years of Leica) and have abolutely no regrets. When Leica, or any other company, charge a premium price for (admittedly)a premium product,the customer should expect and receive a premium service. I believe Leica's warranty ends at the factory gates!!!!!!!!!! Sorry for the rant