Run prelink and other stuff not in cron but when screensaver

[Alan Cox]

> Because to ship screensaver output over vnc takes a lot of CPU
> and network resources. IMHO this should not happen by default,
> because newly setup machine with a few users running vncserver
> hammers the machine.

Just as true for non Vnc screensavers

>      If they want to setup screensavers explicitly, fine, but
> at least you can lart them for that :-)

It sounds to me more of an argument for using 'blank' as the 
default screensaver except on localhost ?