Logged In: YES 
user_id=725330

Thanks for eliminating the duplicate bug report.

As extra info on the reported problem, the latest versions
of Internet Explorer and Firefox handle the described case
fine on Windows, and Safari on OS X also knows how to deal
with it. However, Opera (only tried on Windows) has some
trouble with authentication redirected to another site.

I wasn't sure if I could/should add the above comment to the
original bug report or not.