Not sure if it will work for everyone, but i guess worh a try if you are as frustrated as i was 🙂
this process worked on my mac, just to prove, i tried the steps again, and it worked.
it's the same process outlined by whosten, but with an additional tweak.
1. open image capture
2. connect the phone (imovie will open - one last time) close the import dialog, and imovie app. on my Mac, imovie crashed😟,
3. change the auto-open app for the device to image capture application)
4. if you like to keep image capture to open ( i actually dont mind the image capture to open), do nothing
5. connect phone again, select do nothing when connecting this device (same as step 3 in the earlier post.