Hello,
I'm puzzled with an odd thing. If I try to adopt CSS-like coding style, 

\setuptyping[
	before={
	\blank[2*big]
	\setupinterlinespace[line=1ex]
	},
	after={}
]
\setuppagenumbering[
	location=bottom
] 

works perfectly. But

\setuplayout[
	topspace=0cm, 
	bottomspace=2cm, 
	rightmargin=2cm,
	width=fit, 
	height=fit
]

fails and accepts only

\setuplayout[
	topspace=0cm, 
	bottomspace=2cm, 
	rightmargin=2cm,
	width=fit, 
	height=fit]

What is the rule behind this? :(

Best,
Vyatcheslav