How can I get the caption for the vertical figures (figures 2 and 4 in the example) aligned below the figures with the caption width limited to the figure width? Sorry for the noise -- I am sure I am missing something simple, but I cannot find it at this point. (Running current beta and earlier versions, so it does not appear to be a regression.)

 \showframe
 \setuppapersize[A4][A3,landscape]
 \useMPlibrary[dum]
%% Enable the first set of three for wider picture margins,
%% and the second set of three for standard picture margins
 \def\FullWidth{\the\dimexpr(\textwidth+2\margindistance)}
 \def\PicWidth{\the\dimexpr((\FullWidth-2em)/3)}
 \def\RPicMaxWidth{\the\dimexpr(\PicWidth-\margindistance)}
%\def\FullWidth{\textwidth}
%\def\PicWidth{\the\dimexpr((\FullWidth-2em)/3)}
%\def\RPicMaxWidth{\the\dimexpr(\PicWidth)}

 \setupcombinations[width=\FullWidth]

 \definefloat [rightFigure][rightFigures]
              [figure]
 \setupfloat  [rightFigure]
              [
               location=right, % this does nothing!
               maxwidth=\RPicMaxWidth,
              ]
 \setupcaption[rightFigure]
              [
               width=\PicWidth,
               location=bottom,
               align=middle,
              ]

 \definefloat [leftFigure][leftFigures]
              [figure]
 \setupfloat  [leftFigure]
              [
               location=left, % this does nothing!
               maxwidth=\textwidth,
              ]
 \setupcaption[leftFigure]
              [
               width=\PicWidth,
               location=bottom,
               align=middle,
              ]

 \define\testtext{\dorecurse{5}{This is some text to fill up the
   space. }This is some text to fill up the space.\par}

 \starttext

   \testtext

   \startplacefigure[title={You see this caption!}]
     \startcombination[3*1]
       \startcontent
        \externalfigure[dummy][width=\PicWidth]
      \stopcontent
      \startcaption
        {\bf a.} Subfigure
      \stopcaption
       \startcontent
        \externalfigure[dummy][width=\PicWidth]
      \stopcontent
      \startcaption
        {\bf b.} Subfigure
      \stopcaption
       \startcontent
        \externalfigure[dummy][width=\PicWidth]
      \stopcontent
      \startcaption
        {\bf c.} Subfigure
      \stopcaption
     \stopcombination
    \stopplacefigure

   {\em\testtext}

   \startplacerightFigure[title={Can you see this one?},
       location=right,
     ]
     \startcombination[1*2]
       \startcontent
        \externalfigure[dummy][width=\PicWidth]
      \stopcontent
      \startcaption
        {\bf a.} Subfigure
      \stopcaption
       \startcontent
        \externalfigure[dummy][width=\PicWidth]
      \stopcontent
      \startcaption
        {\bf b.} Subfigure
      \stopcaption
     \stopcombination
   \stopplacerightFigure

   \dorecurse{5}{\testtext}

   \page

   \testtext

   \startplacefigure[title={You see this caption!}]
     \startcombination[3*1]
       \startcontent
        \externalfigure[dummy][width=\PicWidth]
      \stopcontent
      \startcaption
        {\bf a.} Subfigure
      \stopcaption
       \startcontent
        \externalfigure[dummy][width=\PicWidth]
      \stopcontent
      \startcaption
        {\bf b.} Subfigure
      \stopcaption
       \startcontent
        \externalfigure[dummy][width=\PicWidth]
      \stopcontent
      \startcaption
        {\bf c.} Subfigure
      \stopcaption
     \stopcombination
    \stopplacefigure

   {\em\testtext}

   \startplaceleftFigure[title={Can you see this one?},
       location=left,
     ]
     \startcombination[1*2]
       \startcontent
        \externalfigure[dummy][width=\PicWidth]
      \stopcontent
      \startcaption
        {\bf a.} Subfigure
      \stopcaption
       \startcontent
        \externalfigure[dummy][width=\PicWidth]
      \stopcontent
      \startcaption
        {\bf b.} Subfigure
      \stopcaption
     \stopcombination
   \stopplaceleftFigure

   \dorecurse{5}{\testtext}

\stoptext

--
Rik