Not sure if this is the right place for this, so let me know where it belongs if that is the case.
The new Ideas forum - if you click on a link from somewhere to go to a specific idea (someone has recommended in the forum, on Twitter, etc) or you are just browsing ideas, if you are not signed in, you cannot vote. So if you click on the "Sign in" link and go through the sign in process, it takes you to the main page, not back to the idea you were looking at.
Requires going back and getting the link or searching. The old Ideas forum would log you in on the same page and allow you to quickly vote and/or comment.