[NTG-context] \setuppageshift and \setuparranging

Hi, I'm testing ConTeXt's imposition abilities on a cd booket project. I'd like pages to be shifted in order to compensate paper thickness. Running the following code leads to pages that are properly shifted ; but when uncommenting the line with \setuparranging, pages aren't shifted any longer. What's wrong with my code ? Thanks in advance, Nicolas \setuppapersize[CD][A4] \definepageshift[test][horizontal][10pt,20pt,30pt,40pt,50pt] \setuppageshift[test] \setuplayout[margin=5mm,marking=on,location=middle] %\setuparranging[2*2*4,rotated] \setuppageshift[test] \showframe \starttext \dorecurse{14}{\input tufte} \stoptext