This is something that is probably quickly remedied, but as I am completely floored (in my three years as a dedicated mac user this is my first Apple software issue) I figured maybe one of you would know what I can do to fix this. I get an error message when I try to open iTunes, "The iTunes Music Library file cannot be read because it does not appear to be a valid library file". This happens if I try and open a MP3, an actual CD, the application itself, what have you. I recently updated to 4.1, but I am still getting the same error message. I've also tried deleting the program and re-installing, but I am having no luck. Any help is greatly appreciated! Thanks!