Hello - I've not asked a question before, bear with me - I am getting a message in iPhoto that says: "The photo library needs to be upgraded to work with this version of iPhoto." Then below it says: "Your photo library will not be readable by previous versions of iPhoto after the upgrade. The upgrade process for very large libraries may take an hour or more to complete." Talk about causing panic! I have Leopard v.10.6.8 on my Mac, and have the latest version of iPhoto for my OS X operating system, confirmed with Apple yesterday. They have no clue as to why I'm receiving this message. I joined a cloud based backup program on Monday, JustCloud, and I think that process is what is causing havoc with my iPhoto. I'm completely paranoid about choosing the "upgrade" selection in the error message. I have 14,000 photos in my library, I am freaking out. I've had multiple emails with the "JustCloud" people, and they are clueless. Does anyone have any suggestions? Can I somehow restore, or make sure I don't lose my library, using Timemachine? I am practically illiterate, Mac-wise, so any help would be appreciated. Thank you.