Footnoted articulation attaches the articulation to the wrong note

[Vaughan McAlley]

> I’m not top posting

%{
This excerpt looks as it is intended to look, with the \prall on the d
with the footnote attached to it. To get it to look like this, the
\prall needs to be placed before the d. With the code
d2^\prall
... the prall ends up on the c grace note.
%}

\version "2.16.0"

upper = \relative c {
  \voiceOne
  f4 f c' c
  \grace { e8 }
  \footnote "*" #'( 1 . 0 ) #'Script "* Trill if you like"
  ^\prall d2 % should be d2^\prall
  \grace { c8 [ d8 ] } c4 r
}

lower = \relative c {
  \voiceTwo
  r2 r4 f,
  f f c' c
}

\new Staff
<<
  \new Voice { \clef bass \key f \major \time 4/4 \upper }
  \new Voice { \lower }
>>