Error is cross-bar arpeggios using times

[Oscar]

> I'm not top posting.
Hi All,

For a piece of piano music, I wrote a part with 2-hand arpeggios in \times 8/7.
It was originally written with LilyPond 2.6.? where the output looked ok, but
with   v. 2.10.25, the "--- 7 ---" signs (dunno how they're called in English
:-/) get printed in the wrong direction when the arpeggio goes down (upwards
works fine).

This is the code (upper staff, lower staff is just s1*4)

        \change Staff = lower
        \times 8/7 { es,,32 g bes es  \change Staff = upper g bes es}
        \times 8/7 { g es bes g \change Staff = lower es bes g}
        \times 8/7 { es g bes es  \change Staff = upper g bes es}
        \times 8/7 { g es bes g \change Staff = lower es bes g}

        \times 8/7 { f as c f  \change Staff = upper as c f}
        \times 8/7 { as f c as  \change Staff = lower f c as}
        \times 8/7 { f as c f  \change Staff = upper as c f}
        \times 8/7 { as f c as  \change Staff = lower f c as}

        \times 8/7 { as c f as \change Staff = upper c f as}
        \times 8/7 { c as f c \change Staff = lower as f c}
        \times 8/7 { as c f as \change Staff = upper c f as}
        \times 8/7 { c as f c \change Staff = lower as f c}

        \times 8/7 { g b d g \change Staff = upper b d g}
        \times 8/7 { b g d b \change Staff = lower g d b}
        \times 8/7 { g b d g \change Staff = upper b d g}
        \times 8/7 { b g d b \change Staff = lower g d b}

I can mail more of the code and the full output (correct and erroneous) if that
might help.

Thanks for your great product!