In 9.04, as I understand it, yes, everything was based on Ubuntu, and switched to Debian with 10 Alpha. Based on what I heard in Linuxoutlaws144 interview, and my own flawed understanding of the United States legal system, we're completely whacko about enforcing copywrite, including names and symbols - so, no red/orange/yellow circle for 9.04. As I understand it, unless a company comes out and defends their licenses of a logo, they can lose it. (A shot of Vodka with a beer chaser helps silence the inner voice of common sense.)
Debian, which is not a corporation, isn't looking to sue anyone over use of their stuff. Cononical may HAVE to sue in order to remain in the American marketplace. (Additional shot of Vodka, chased by beer.)
I think paying your respects to Debian and Ubuntu is just and fair, because with them our favorite distro wouldn't be here, but we are Geeks. The bloody Lawyers (Barristers in the UK - I have no idea what they're called in Germany) have made the rules. 
Death and I have a working relationship.
Anyone touches my coffee I send him some business.
Sector11My attempt at a blog;
http://jims2011.blogspot.com/