The insert code looks pretty good. But the only thing ilooks odd is, If I insert a code and again I choose to insert code and on clcikiing of insert code in menu its displaying a box with already inserted code. It could have displayed empty code highlighting box. Recently I answered a query where I inserted code in 3 places. All the times when I want to insert I need to clear the old inserted code. When i click insert code, Its populated with previously inserted code.

I use firefox.