IOS – Where’s iOS 4.2 image file

You can use the CCK to export photos off an iPhone and import them to the iPad (which isn't new), but no one has yet been able to get the CCK to hook an iPhone up to anything else.

I found a fix on the Apple Discussions board:

1. Go to ~/Library/ (i.e. open your home directory, then select the Library folder)
2. Get Info (click File -> Get Info or type ⌘I)
3. If possible, make sure the lock at the bottom right corner of the Get Info window is unlocked
4. Make sure the Sharing & Permissions: section is visible
5. Where it says "Username (me)" make sure the privilege is set to Read & Write
6. In the little tool/wheel pulldown right below, select Apply to enclosed items (say yes, if it asks you if you know it can't be undone)
7. Try the upgrade again

This worked for me. Hope it helps!