Bad position of dot in polyphonic disposition with crossed voices

[J . F . Lucarelli]

Dear webmaster,

This is not realy a bug, but an abnormal position of the dot in polyphonic
disposition, when the voices are crossed.

Without any correction, the disposition appears as shown in the figure located
at http://i30.servimg.com/u/f30/09/00/19/53/dot110.jpg

I think the correct arrangement is as follows :

http://i30.servimg.com/u/f30/09/00/19/53/dot210.jpg

But this requires two corrections:

\once \NoteColumn override # 'force-hshift = # 0.8 (on the quarter note)
and
\once \Voice.Dots override # 'extra-offset = #' (-1.5. 0) (on the half note)

The first instruction must be introduced manually, but then the dot of the other
note follows the movement of the first one.

I think the second instruction (\once \Voice.Dots ) should be set automatically.

However, it's really a small detail in comparison to the fantastic possibilities
of LilyPond.

Best regards,

Jean-François