My iPhone 3G is being recognised perfectly happily by iTunes, but absolutely nothing else. It doesn't appear in Finder and doesn't open iPhoto when I plug it in, so I can back up my photos. I've tried restarting both the Mac (which is running Snow Leopard) and the iPhone. I've tried several cables. The result is always the same. iTunes spots the iPhone (it did use to automatically open iTunes, but I stopped that) and nothing else. No icon on the desktop, no appearance in Finder and won't show in any searches I do. How can I fix this, and start backing up photos again?