Hi again,

when setting a background layer combined with an early font setup
there appears a “0” (ascii 0x30) right after “\starttext”:

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\setupbodyfont[sans] %%% <-- comment this out and the “0” vanishes
\definelayer[bg][x=0,y=0,width=\paperwidth,height=\paperheight] %%% <-- or this

\setlayer[bg]{%
  \startMPcode
    draw fullcircle scaled (.5*PaperWidth) withpen pencircle xscaled 7 withcolor \MPcolor{gray:7};
  \stopMPcode
}
\setupbackgrounds[paper][background=bg]

\starttext
\input dawkins
\stoptext

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Removing either the “\definelayer” or “\setupbodyfont” statement
makes it go away.

What have I come across this time?

Philipp