Placing a movie with the following code places the static overlay a  
bit (too far) to the right, spilling it on the right side out of the  
frame:

\useexternalrendering[sharkfilm][video/quicktime][shark.mp4]
\defineoverlay
	[shark][{\externalfigure[shark-film][width=\overlaywidth,type=jpg]}]
\starttext
...
\midaligned{%\framed[offset=0pt, strut=no, background= 
{foreground,shark}]%
	{\placerenderingwindow[movie][sharkfilm]}}%

Is there some spurious space in the code? Perhaps a missing % at the  
end of a line? I could not spot the culprit in the code, but I might  
have been looking in the wrong places.

Then as an additional question:

When running the movie a thin white frame line appears around it. I  
find it annoying but did not find out how to get rid of it. Nor have  
I been able to change the background color locally (when leaving out  
the external figure in the overlay) or get rid of the text "Screen"  
that appears.
I found a macro \setuprenderingwindow but did not find out about the  
settings it understands.

Can someone enlighten me?

Hans van der Meer