The partial quote prompt covers the text and interferes when the user highlighting text for other reasons. For example, they only want to select the name of a product and copy it to the clipboard using right-click. BTW, Opera 12.x is still supported and upgraded by Opera. The newer version is built on Chrome and little by little they are adding Opera features back. That's why many user stay with 12.x and why Opera supports it for the time-being.