Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I'm having this problem as well. I found the AppleMobileDeviceHelper.app, but starting it doesn't do anything.

If I get an answer, I will try to remember to post it here.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.