Rails 3/Bundler doesn't call rails/init.rb any more?

Just wondering if anyone can confirm this for me.

Updating an existing app from 2.3.5 (without Bundler) to 3.0.0b3 (with
Bundler) it appears that the “rails/init.rb” file is no longer
evaluated for vendored gems any more. Or for non-vendored ones,

No big deal. I can explicitly call the set-up from a file under config/
initializers, but I’d like to know whether this is intended behaviour
or a bug first.