I have a customer running Vista and IE 7.0.6000.16643
She can successfully navigate our Web site except when she comes to one of our password protected links. The moment she clicks on one, she gets a message that says: IE has stopped working. Windows will close IE... etc. We will notify you if there is a solution to the problem etc.
I'm mystified about this. I don't run Vista and my Windows XP works perfectly.