Hello folks, I love Aperture 3, it works GREAT on my Mac Pro, however, on the mbp it is sluggish, primarily the 3-4 second "loading" time for each photo (from a blurry photo to a sharp photo). I tried to decrease preview size and quality, tried to relocate masters elsewhere, but nothing works, I still get 3-4 second loading time for all edited photos. I have no such problem on my Mac Pro, since it is a beast. Currently on my 2008 2.4ghz MBP with 4gb of ram, I have a 500gb 7,200rpm 50% full hard drive in the optibay dedicated as the scratch disk for Aperture 3 library. And my OS/App/etc drive (1/3rd full) is the new Seagate Momentus XT 500gb, still no change. I thought of getting a SSD, but after reading other comments and realizing that a SSD wouldn't change the "loading" time because my library will still be accessed on a slower 7,200rpm scratch disk. Should I try buying a single 4gb stick of ram (to get a total of 6gb including the 2gb stick already in it), or even two 4gb sticks of ram to see if it will run faster? The 3-4 second loading time is unworkable, especially on the field, I wish I can take my Mac Pro along, but that is just not possible. I am running out of ideas, I though relocating my masters would solve it because it reduced my A3 library to 1/3rd of its original size, but the loading time remained at 3-4 seconds. Thanks in advance!