The (active) mode line face now displays Helvetica correctly.  Note,
however, that in the inactive mode line face the characters are wider,
although mode-line-inactive does not override the width attribute of
variable-pitch (changing the width attribute to "narrow" still results
in a font family of "monotype-Impact").  In addition, the broken
underlining remains (the image shows the spacing with
x-use-underline-position-properties set to nil), also in the Gnus
Summary buffer.  In the latter, the underlining to the right of the
vertical separator only appeared after moving the cursor over this
region; it disappears when the buffer does not have focus, or when the
mouse moves over it (it has a mouse-face overlay).  Note also that the
non-ascii characters (the vertical line and the curves and arrows used
for threading) look much worse than after the previous update: thin,
misaligned, and leaving vertical gaps.

Steve Berman