I backuped my iphoto library to a NTFS USB drive and then formated the macbook.

Now when importing, I get just black thumbnails. The photos are there if I open them, but I can't restore them.

I've tried Repair Disk permissions, Cmd-opt when starting iPhoto to ask it to rebuild the thumbs(all options in several combinations), and even chmod -R 777 to iphoto library. No results.

I think it is a permission or excessive file lenght problem deriving from using a NTFS drive.

Any sugestions to rebuild the library?