Question about using Symbols...

I didn't know if my Symbol tool was working properly because I could have sworn the symbols previewed as boxes in outline mode. It might have been something I saw when I used an "image" as a symbol, but I just wanted to make sure it wasn't a vector used as a symbol. I hardly ever use them, so I couldn't remember how they worked, but I thought all symbols previewed as boxes in outline mode, and I guess I was wrong.

I realize that an image or "photo" will display as a rectangle in outline mode. I was talking about using a "vector-based" Symbol in a drawing (ex. - an icon you drew yourself and dragged into the Symbol palette) and seeing it as a rectangle while viewing the drawing in outline mode. I could have sworn that was the way it use to be. I guess what I am asking is for someone to verify that a vector-based Symbol does or does NOT appear as a square in outline mode or if you actually see the vector art.