Bug: alignment

[Jérémie Lumbroso]

Hi,

  I  was just touching up a couple of pieces when I realized
  the  dotted notes aren't aligned together. Why's that? Why
  aren't dots aligned together?

  < \Voice {\stemDown <c4. e> }
    \Voice {\stemUp <g4. c'> }
  >

  Jérémie