black box

[Deborah Mowry]

I make a chart and add through Chart Options the Y:axis labels "Percentage",
like done many times before. However, for this one chart, everything looks
perfectly fine until I print it and the label is only a black box.
There is nothing but Automatic for any border or fill colours, there is no
special formatting applied anywhere to the chart or spreadsheet.

Any ideas?

Thank you
Deborah