2.1 has a lot of changes and we have a lot of backwards-compatibility with theming right now. If you don't know what you are doing then don't go unstable.
With regards to the canonical url thing. I may take out that if statement since it can't hurt, but for now don't worry about the canonical url not being there. The purpose of the canonical url is to remove ambiguity between two of the same page on different urls.
Answers
Thanks luc!
2.1 has a lot of changes and we have a lot of backwards-compatibility with theming right now. If you don't know what you are doing then don't go unstable.
With regards to the canonical url thing. I may take out that if statement since it can't hurt, but for now don't worry about the canonical url not being there. The purpose of the canonical url is to remove ambiguity between two of the same page on different urls.
Okay, got it. Thanks Todd!