This has been annoying me for a little while now, but I kept assuming I'd clicked the wrong thing...
Used to be, if you were somewhere on a site - say, viewing a question - and clicked "login", you'd be directed through the login process and then brought back to the question after successfully authenticating.
Now, I'm brought to the home page.
Steps to reproduce:
- Open a browser session and visit a site on which you're not logged in.
- Open a question.
- Click "login" in the top bar.
- Click "Log in using Google" and log into the site using your Google account.
- Note that you're now viewing the home page rather than the question you opened in Step #2.
I've tested this using both Chrome 36 and Firefox 31 on Windows 8.1. The Stack Exchange and Facebook providers work as designed, but logging in with Google breaks as described above.