mutlti-voice alignment

[Kieren MacMillan]

Hello, all --

Any idea/explanation for why the alignment is off (between the fs and  
a) in the following example?
I can tweak it with a NoteColumn #'extra-offset, but I'd rather not...

Thanks,
Kieren.

%%%  CODE BEGINS
\version "2.9.15"
\include "english.ly"

theNotes = \relative
{
        \key e \minor
        << <g' a d> \\ fs8 >>
}

\score
{
        \theNotes
}
%%%  CODE ENDS