Phil Holmes wrote
What's the cautionary on the 3rd beat of the second bar doing there?
isn't that what piano-cautionary asks for?
from NR Chapter 1: Musical notation:
piano-cautionary
This is the same as piano but with the extra accidentals typeset as
cautionaries.
piano
This rule reflects twentieth-century practice for piano notation. Its
behavior is very
similar to modern style, but here accidentals also get canceled across the
staves in
the same GrandStaff or PianoStaff, hence all the cancellations of the
final
notes.
This accidental style applies to the current GrandStaff or PianoStaff by
default.
modern
This rule corresponds to the common practice in the twentieth century. It
omits
some extra natural signs, which were traditionally prefixed to a sharp
following a
double sharp, or a flat following a double flat. The modern rule prints
the
same
accidentals as default, with two additions that serve to avoid ambiguity:
after
temporary accidentals, cancellation marks are printed also in the
following
measure
(for notes in the same octave) and, in the same measure, for notes in
other
octaves.
Hence the naturals before the b and the c in the second measure of the
upper
staff
after reading all this I feel the current behavior is correct
Eluze