How does one reset the library's cache? I deleted some files (>500) a while ago and when I copied the photos folder onto this newer computer the cache got messed up or something because I have blanks for those missing files. And it really bugs me in the library because it gives me the perpetual spinning beachball when I try to delete them and I have to force quit. I did a search and someone set holding option will allow you to reset the iphoto library, but I only get options to choose another library or create a new one, not rebuild my current one. Any ideas?