Dear all, in the following example, header and footer behave differently, the frame at the bottom being out of the footer space. Could you tell me how to obtain a frame inside the footer like the header one?

\setupheadertexts[{\framed[frame=off,width=\textwidth,height=\headerheight]{not offset}}][]
\setupfootertexts[{\framed[frame=on,height=\footerheight]{offset}}][]
\showframe
\starttext
\input knuth
\stoptext