0 - Use firefox
1 - Open the advanced editor
2 - Click 'new macro'
3 - name it
4 - the editor window has only one line
This js is a workaround for the moment:
The bug appears to stem from Bug 16239, but I haven't been able to figure out exactly what's going on.
Yep it has something to do with the way FireFox is rendering the page, because it is fine on Chrome.
Still encountering this