There have been no recent reports that I have seen of anyone else having this problem. You probably already know this but this function is implemented by storing what's commonly called a cookie on your machine. If the cookie is deleted, then you have to enter your user ID and password. If you explicitly log out, the cookie is deleted. Clearing cache or history will also delete it along with any other such cookies stored on your machine. If to leave the site you just kill the browser, the cookie should remain.