Font Control in Fields

[Daniel Graham]

I'm having trouble controling the font used to display the contents
of interactive fields.  I want to use the same font and size as the
surrounding text.  Whether the document uses cmr or lbr, I seem to
get the same font inside the fields (neither cmr or lbr) and, while
I can set the face with, e.g., style=bold in \setupfields, I cannot
change the size of the font.  Is the choice of this font beyond the 
control of ConTeXt?
-- 
Dan