Got Rainbow Feather javascript error?

first of all, get rid of the following two things in the header.php:

window.onload = function() {
new SmoothScroll({duration:2000});
}

because if you use lightbox (with prototype it does not play along that well.)
if you want to use lightbox with moo,
you should use slimbox

the file (feather.zip) comes with different headers:
one for slimbox and moo.tools (smallest) default install
one for lightbox (no moo.tools) bigger

also, see the manual.