As we know, since the spanshot 13w04a (r1.5), when you rename a Command blocks with an anvil use their name instead of @ in the chat. For example, I use an anvil and rename it to "Herobrine", and the text I put is "The secret temple is located at...", now it should be displayed like this:
http://i.minus.com/jb0wQS15VVWfcJ.png
Ok, now I will change the String>CustomName of the Command block with an external program, and I add the section sign (§): "§cHerobrine", now Minecraft displays the command like this one:
http://i1.minus.com/jbcvx9Fek6VnyK.png
The issue/bug is notable, everything change, even the text of the command (that by the way is not an issue or bug), BUT the first bracket keep the original color, the white. This is obviously an issue. Please fix it! 😃
The picture I left below is another example, but similar:
That's one of the reasons why § cannot be used directly in the anvil.
Not a bug.