[NTG-context] problem with bottomframe, bottom and align=middle

Hello, in the following example, the bottomframe of the first column is lowered: \starttext \setupTABLE[frame=off,offset=0.2em] \setupTABLE[r][1][bottomframe=on,align=middle] \setupTABLE[c][1][bottom=h] \setupTABLE[1][1][bottom=] \bTABLE \bTR\bTH 1\eTH\bTH 2\eTH\eTR \bTR\bTD 3\eTD\bTD 4\eTD\eTR \bTR\bTD 5\eTD\bTD 6\eTD\eTR \eTABLE \stoptext How could I solve this problem? Cheers, Peter -- http://pmrb.free.fr/contact/