I have used a layer effect "multiply" over a line layer, other time I have used a plain
color layer under a line layer and no problem. This is the first time I have used layer effect multiply for all coloring.
So I wonder is the problem with the layer effect multiply in InkScape, or with the XML editor.
This is a preview of the picture, the final step I lost.

I have older progress step of the picture, so I can go back and fix it
InkScape 0,46/Ubuntu 9.04 64 bit