I painstakingly wrote a question up, not realizing I wasn't logged in.  When I was done, I noticed that there was a log-in button below the question box, so I assumed that's what I needed to do to proceed with posting my question.  

After I logged in, I was taken back to the home screen, not my post.  When I used my browser's back button to go back to my question, everything I had typed was gone.  This is extremely frustrating.  If you log in from the Ask Question page using the inline log-in button, it should save the state of the question.