Hi there, Before obtaining the 10.7 Lion Upgrade I backed-up my system using Time Machine and started fresh with a copy of 10.6 before installing the 10.7 update and transferring over my old files and applications. Unfortunately, iPhoto now displays an error when it opens stating that "You can't open your Photo Library using this version of iPhoto". It also says that I've made changes using a newer version of iPhoto and I should use the latest version of iPhoto, however, the Photo Library would only have been opened on 10.6 under the most recent version available at the time, I then upgraded to Lion, installed & updated iPhoto from my original install DVD's and tried to open the Photo Library using the latest version but to no avail. I have tried re-installing iLife from the Application Install DVD's again but the error still displays. I have also tried using an old iPhoto Library from my Time Machine backup several months ago, again to no success. Any help would be greatly appreciated!