The symbols used for all x-y series are all the same.

1) new gnumeric
2) fill c4:g7 with simple values
3) select c4:g7
4) click on graph guru icon
5) select xy "plot type"
6) click ok
7) place the chart
==> this is a two series chart of x and y values, there should be two sets of
symbols but there is only one.
8) try to edit the properties of the first series
==> the symbols don't change look