[1] http://en.wikipedia.org/wiki/Mozilla_Corporation_software_re...
If Mozilla Corporation (or would it be Foundation?) felt that they wanted to enable this kind of derivative distribution of their software, they could have very simply offered provisions like the Linux Trademark Institute: http://www.linuxfoundation.org/programs/legal/trademark. Clearly, Debian still has many references -- and modifications -- to Linux.
Problem solved. But, as far as I can tell, this was not to be.
I am not a Debian developer nor someone who was actively following that conversation, but when I heard about the decision I have not heard a single convincing (or even any) argument that it was an incorrect one, but again, I'm not familiar with the matter in great detail. Proprietary software companies can be awfully persnickety about...well, everything regarding their license and trademark, and I don't see why lack of adherence to a contract is acceptable just because there is Free Software (but not free trademark) involved.
The silliest part is the name chosen.
http://lists.debian.org/debian-devel/1998/11/msg02560.html
The only problem with it is that, at least in the past, there were no qualifications to join it, so you got lots of "legal opinions" from people that weren't necessarily grounded in any sort of actual ... reality.
In any event though, Debian is awesome, and an extremely impressive volunteer effort.
-- Debian user since April 1996 (0.93R6)
I rejected debian a number of times early on because of d-i. Just like the parent I did slack->redhat->debian and it was a friend in college that helped me get over my debian installer phobia. After that I have not looked back.
I will admit I flirted with Ubuntu once or thrice but I never found any compelling reason to switch and I was never been able to get used to the minor modifications that they make to Debian. Do not read that as a knock on Ubuntu. I think Ubuntu is a great distribution for casual linux users. Ubuntu (and canonical) has done a lot for the adoption of linux in general.