When you insert embed code from YouTube etc., the visual editor provides a yellow placeholder box so the author can see where it's being placed.
But when you make a Google Gadget or Chart (from Google Docs spreadsheets) the "embed" code it gives you is not actually inside of object or embed tags. Instead it lives in a script tag.
These do work fine when published into WordPress, but the visual editor does NOT give any indication that something is there. It becomes a completely invisible element in the visual editor.
Any fix or workaround for that you can think?