I am running Lightroom 4.1 RC on a 2010 iMac 27" with 2.93 core i7, 16GB of RAM and a 512GB Crucial M4 SSD drive (where the Lightroom catalog resides). When I scroll through images in Library, I can move through images very fast, however, when I try to do the same in the Develop module, it becomes really, really sluggish. Probably about 5 seconds between images. I have 1:1 previews generated. Is there a workaround for this?