In safe edit I'm told tht I can't add new divs. Is this correct?
Yes, it is.
Of course, it's worth bearing in mind that this refers to DIVs as in a DIV asset. You can still add <div> tags within the content :rolleyes:
Solution found:
added empty div to live page -> change status to safe edit -> insert data to the new div
You're about the fastest for working out that particular workaround. :) Well done!