1. Create a calc document;
2. Insert->Picture->From file..., choose a picture, insert it into document;
3. Double click on the picture, type some characters. Notice the font size;
4. Copy the text on the picture to clipboard;
5. select a cell, paste;    //You can see font name and size changed.
6. Double click in another cell, CTRL-V;    //You can see nothing in the cell
7. Click another cell.     //You can see the text in the cell pasted just now, 
and the font size changed too.