From the From One of the Horse's Mouths dept.:
There have been quite some comments on the Iceweasel case all over the planets, and I saw several assertions, especially from the Mozilla camp, that I, as the Firefox® co-maintainer, the xulrunner maintainer, and (soon) seamonkeyiceape co-maintainer, have to rectify.

They broke the –enable-official-branding flag
Half-true. We just replaced Bon Echo/Deer Park with Firefox® in the appropriate places in the build tree so that we could have Firefox® with the “unbranded” logo instead of the official logo, as Gervase Markham gave us authorization for. You’re still free to enable the official branding, except that since the logos and stuff are non-free, we removed the other-licenses/branding/ directory from the original tarball, thus yes, the flag is half broken.

Firefox® logos being subject to trademarks, Debian thinks they are not free.
Trademark and copyright are different things. Mozilla® has unnecessarily given a non-free license to “clarify” the trademark situation, but that is not required. To make it clear: Debian thinks the logos are not free because they are not free. Period.

glandium.org/blog/