Updated yesterday to 10.5.2 The minute I started using the computer (white iMac Intel Core 2 Duo 2.16 GHz, 2GB SDRAM), problems arose. Some of them were caused by LinoType FontExporerX, which I deactivated. Things are going a little better since, but there are still many issues : - The computer is now MUCH slower. Applications will crash randomly. - Specific software seems to be problematic : Transmission (Torrent dowload application) makes the computer even slower, and it seems impossible to use it simultaneously with other apps; Safari crashes a lot more than before; iTunes has difficulty reading songs (!), and the iTunes library can't overwrite itself anymore. I wonder what's going on. If anyone has an idea, let me know, it would be greatly appreciated.