Hi Alex !
First thanks for this amazing plugin :)
I'm using WordPress 3.7.1 and SHE 3.1.7 :
- In Firefox 25.0.1 : there is a gap, the first line (1) is empty and the last line is not formatted (no line number).
- In CSS, some tags are not colored : h1...h6, pre, code, small, center, caption, embed
- In CSS, a property is not colored : resize
- When I activate the toolbar, it only shows the question mark (about), in all browsers.