Same problem. I got this MBP so I could use it to download SxS cards. System now hangs at start for 7 minutes or so. I first did a firewire transfer of all my apps to the new MBP and when done, the hanging problem was there. Not knowing where to begin to find the problem, I erased and reinstalled the Mac OS onto the new MBP, and began re-installing software one disc at a time. Sure enough, everything worked perfectly until I installed the SxS card driver.