Alright so I bought a copy of Aperture 3 and just upgraded from Aperture 2 once I installed it, it had to convert my older library into Aperture 3 format it said it would take overnight so I came back in the morning to see a massage saying something like " your startup disk is full please close other applications for more memory " which was really strange because my Aperture library is not even on my start disk and I had 60gb's left on my startup when I went to bed. not to mention the computer was the slowest I had ever seen it. could this be because it ran out of ram and started using the startup as virtual memory? and if so why did it use 60gb/s of storage and still not have enough? this is a huge problem apple needs to fix it seems to do this as soon as I start up Aperture every time.