All the custom icon themes I install can change the nautilus icons just fine, but the unity panel always looks like this:
Except when I set it to the standard Ubuntu mono, that looks normal.
I'm sure the themes I've installed have these icons present, and that the problem is that they are for some reason unable to load them.
How can I fix the problem? I'm using Unity Tweak tool to change them, and downloaded the themes from gnome-look.org if that matters.