SVG Import doesn't support CSS3 colors (rgba())

Steps to reproduce:

• open Inkscape
• open the attached SVG file

What happened?

See first screenshot. The paths with transparent filling have black filling instead

What should have happened?

Should look like the second screenshot, which is how Google Chrome renders it (and it's correct) (I zoomed out for the sake of the screenshot). The outer paths all have fill="rgba(255,255,255,0)" which is white with zero opacity which is transparent.

Inkscape Version and Operating System:

• Inkscape Version: ... 0.91 r13725
• Operating System: ... ubuntu
• Operating System version: ... 16.04