Paraphrasing Tim [1] "I'm definitely -1 on losing 3.5.1, the canonicalization warning is a hard-won compromise and seems to cause no-one any pain."
We discussed this at extreme length, and no new arguments have been brought forward. Rough consensus does not mean absolute consensus.
- Sam Ruby
[1] http://www.imc.org/atom-syntax/mail-archive/msg12672.html