For some reason, Image Capture doesn't always update the list of devices after I plug in my iPhone. Sometimes restarting Image Capture works, and sometimes it does not. Does this have to do with the number of images on my iPhone, which is several hundred? The fact that there's a passcode on my iPhone?
Is there a steady way to make my iPhone appear?
The iPhone is indeed visible in iTunes. Connecting via the other USB port makes it visible in Image capture as well - after a wait.