Black borders around disabled buttons in Nautilus while using Radiance

[Kristijan Puljek]

I have this weird black border around inactive elements in Nautilus ever since I upgraded to 16.10.

Steps to reproduce:
Switch to Radiance

[Kristijan Puljek (sampleofsoul)]

Found the culprit. In Radiance's gtk-3.20/gtk-widgets.css I commented out the border-image-source under .primary-toolbar button:disabled:

.primary-toolbar button:disabled,
headerbar button:disabled {
    background-image: -gtk-gradient (linear, left top, left bottom,
                                     from (shade (@dark_bg_color, 1.01)),
                                     to (shade (@dark_bg_color, 0.99)));
    /*border-image-source: -gtk-scaled(url("assets/button-toolbar.png"),
                                     url("assets/[e-mail]"));*/
}

Attached is the modified file.