Crashable screen saver

[Peter Hillier-Brook]

Could someone point me to the configuration file that points to the 
current screen saver, please? I made the mistake of browsing the 
available choices and discovered that the "Molecule" version crashes my 
machine. That is, it locks up everything but the mouse pointer so there 
is no way out short of the Big Red Button.

Even this doesn't help a lot as the screensaver preferences dialogue 
starts up with "Molecule" pre-selected, thus causing a recursive lock-up :-)

I've temporarily got round the problem by renaming every file in the 
system with "Molecule" in its name, which seems a fairly crude over-kill 
for a simple problem.

Peter HB