My whole library vanished ... is there a limit to the amount you can keep in there? When I do a search on spotlight the photos can be found in stangely numbered folders, so they have not been deleted altogether, but are not viewed in iphoto. Is this common..... is there a reason and can it be fixed????? I guess it is wise to always back up photos to an external hard drive, to do this do I just drag the whole iphoto app. into the haed drive. Thanks !!!!!