In preparation for iOS 5, I just ran all available updates for my 2011 Mac Mini. After the Mac OS, EFI, and iTunes updates had run, I started downloading iOS 5. Near the end, the Mac Mini kernel panicked and wouldn't restart until I installed the original RAM. So it seems my RAM is shot (model is Kingston KVR1333D3SOK2/8GR 4GBx2). If anyone has experience with this RAM and Kingston in general, I'd love to hear it. However, I'm suspicious that the EFI updates can be hard on Mac's. Last year, my sister's Macbook started kernel panicking almost daily after a firmware update, her hard drive failing soon after, with the kp continuing for a while even after replacing the hard drive. Anybody else see issues following an EFI update or am I reading too much into this?