Yeah dont get me wrong Leopard has some damn clever things under the hood but they dont work properly yet. I got very used to OSX never crashing/locking up over recent years. It does happen occasionally with Leopard but sure theyll fix them.
Its still a fraction of the times my windows boxes die. I just got used to it never breaking.
Recent updates though been a few that have sorted a fair few things out
One annoying one was when it crashed and the keyboard reversed everything on reboot so you had to do it again
