I've only just started using iPhoto and I'm ending up with four of each file. One original in a folder I created on the desktop before using iPhoto, and then three which iPhoto stores - one in 'Originals', one in 'Data' and one in 'Modified'. My 'iPod Photo Cache' is also 60MB in size. What the hell is going on? Is this normal? I'm going to run out of disk space VERY fast!