So I've spent a few hours transferring photos into Aperture tonight. I made some color adjustments on a few of them...but now I can't figure out how to save them. I've tried exporting them to a new folder, renaming and exporting, e-mailing...you name it. Whatever option I choose...it just spins and says "exporting" but never finishes. I've waited up to 15 minutes before ending the program and trying again. What am I doing wrong??? Thanks in advance.