Comment 11 for bug 172778

I tried hard to reproduce this problem again to provide exact steps, and I couldn't.
When I encountered it for the first time, I opened document properties, clicked on a checked "Visible" checkbox in a grid tab, and blue grid lines turned lighter. I don't know if was the effect of redrawing grid lines in document settings (reduced opacity), or drawing them just once (can they be drawn twice by mistake?).
At any rate, I encountered different problem with "Show grid" command having no effect on grid visibility.
Let me know which source file to scrutinize, I suspect something's still not quite right...