borderColor disappears before animating

Animating a borderColor should have the same look and functionality as animating a backgroundColor. In this example of animating a backgroundColor, there is a smooth transition:

http://jsfiddle.net/t33GY/

When you animate a borderColor, however, it immediately disappears before fading the new color in: http://jsfiddle.net/REcMp/

This creates an issue if the user wants to fade the current borderColor to the background color, as it immediately disappears then re-appears at the correct color: http://jsfiddle.net/Rdxj2/