If you try to go to a Flash site on your iPhone, you are often taken to Adobe's "Get Flash" page because the site thinks this is an option for you. It obviously isn't, of course. But for those who go to the "Get Flash" page on their iPhone, Adobe is adding some sass to their "iPhone doesn't support Flash" message.
This message has been around for awhile (as far as we remember) but it has only lately specified iPhone. Perhaps to differentiate between mobile Webkit browser that support Flash like Android and Blackberry will and those that don't.