Hello,
on my site, when I use “hollow” icons, they look wrong. They are merely a reversed version of the original icon, instead of the real FontAwesome icon it’s supposed to be. I made an example page, to show you what the problem is and placed the icons on my site next to a screenshot from the X-Theme documentation for icons.

As you can see, the filled icons look just fine, but the hollow icon is kind of broken. Can you help me with this?