i'm having a very strange problem migrating data from my macbook pro (10.6.8) to my new macbook air (10.7.5). i've been in touch with a supervisor level guy at apple support and he doesn't know what the problem could be.
i keep some folders on the grey side bar of the finder for easy access. when i do the migration (i've tried both wireless and with an external hard drive) some of those folders show up with no content and no ability to even click on them.
when i checked back with the pro i saw that some of those folders had had their contents moved to the trash (i didn't do that!). so i moved the content back, created new folders and trashed some of the non-functioning folders.
then i did another migrate and some of the new folders from the pro didn't show up at all and i still had the problem folders that i couldn't click on.
i can't even get rid of these zombie folders on the air because they can't be found in any of my regular data and they can't be dragged from the sidebar.
Jumping in and hoping not to muddy the waters. I suggest starting over. Boot the MBA with CMD+R, select Disk Utility, erase the HD, quit DU, reinstall the OS, and on first boot follow the steps in Pondini's Setup New Mac guide. That should alleviate all your current issues.