Button Problem

I installed Windowblinds and Leopard Glass and firefox with Leofox installed. I have uploaded a screenshot of what the problem is:

How can I get rid off the black ugly edges around the buttons? Thanks

#489302

re apply the theme. or reboot the pc

#489304

Doesn't help at all.

#489306

try delete the theme and add it again

#489310

Thank you that worked.

#489313