arpeggio problems

[Eluze Weehaeli]

hi

when the notes of a chord are close problems with arpeggios arise
- \arpeggioNormal - the zigzag line cannot be recognised as such
- \arpeggioArrowUp - the arrow is below the chord, the zigzag line is missing
- \arpeggioArrowUp - the arrow is below the chord, the zigzag line is missing
- \arpeggioParenthesis - the parenthesis can nearly be distinguished
- \arpeggioBracket - this is the only really visible and readable arpeggio!

\version "2.11.57"
\layout { ragged-right = ##t }
{
 \arpeggioNormal < e'' g'' > 1 \arpeggio
 \arpeggioArrowUp < e'' g'' > 1 \arpeggio
 \arpeggioArrowDown < e'' g'' > 1 \arpeggio
 \arpeggioParenthesis < e'' g'' > 1 \arpeggio
 \arpeggioBracket < e'' g'' > 1 \arpeggio
}

is there a way to tweak this or is it a bug?
thanx
-eluze