I've had my PSP freeze twice for me today since I inserted the memory. I suspect it might be due to the fact that I'm using a Pro-duo adapter vs an actual pro-duo card, but I would like somebody else to confirm. The first instance was when I was playing Dissidia 012. I had been playing for roughly an hour and a half into the story, and the game just kind of randomly froze whilst speaking to the Moogles for the first time. Not a huge deal. I can skip cut scenes I may need to again and cover the battles I fought relatively easily. The second time was when I booted FFIV Complete Collection. It froze during the intro movie before I even hit the game selection. Both times I just shut it down normally and reboot it. Both times had me going back to the XMB, then booting up the ISO again after placing the PSP into sleep. Do I need to fully reboot the system each time I go to boot an ISO after quitting from another? Oh yeah, and FF4 was freaking out a little saying something about not being able to create save data or something, but then it made it. I figured it was no big deal and just a minor error.