This is due to the fact that catfish uses so-called client-side decorations whereas all the other applications in your screenshot use xfwm4's decoration. The two cannot simply "be the same". This takes effort and doesn't work 100% with random themes.
So: not a bug in catfish. I'm also not sure if or where or how it would be resolvable.
This is due to the fact that catfish uses so-called client-side decorations whereas all the other applications in your screenshot use xfwm4's decoration. The two cannot simply "be the same". This takes effort and doesn't work 100% with random themes.
So: not a bug in catfish. I'm also not sure if or where or how it would be resolvable.