In our moodle 2.7.2 (Build: 20140908) we have installed the otherwise excellent Essential theme (version 2.7.7 (Build: 2014090303)
But we are experiencing some issues with buttons floating on top of other elements. Eg in the course setting as per screenshot.
The only setting done in the costum css is this line
#page-header a.logo { width:167px} to adjust the size to match our logo file.
Have I done anything wrong or is this a bug in Essential