Gtk-WARNING: Not using units is deprecated.

[paride]

Every now and then I get this message:

Gtk-WARNING **: Theme parsing error: gtk-widgets.css:1214:18: Not using units is deprecated. Assuming 'px'.

The problem seems to be the border-width set to 1 instead of 1px, here:

combobox > .linked > button.combo:disabled:last-child {
        border-image-width: 3px 3px 4px 0;
        border-radius: 0 3px 3px 0;
        border-width: 0 1;
}

Should be trivial to fix.