I've just noticed that I haven't been able to download the 9/30 security update on my TiBook running 10.3.4. Does this mean 10.3.4 is not supported? 10.3.5 is unstable on my machine -- I spent a week downgrading my machine to 10.3.4 to stabilize it. I did some other things, such as remove most of my preferences, etc, so maybe it wasn't 10.3.5 that was causing the instability, but regardless, I can't use the new security update. Should I bite the bullet and install 10.3.5? Any other suggestions?