A vulnerability has been identified in Internet Explorer, which exposes sensitive information to "msn.com" and "alexa.com".While it's called a bug, I have difficulty categorizing it that way.
While this is a known "feature" when the "Show Related Links" option is activated in Internet Explorer, there is a bug, so that Internet Explorer will keep transmitting the information to "msn.com" and "alexa.com" after "Show Related Links" has been de-activated. This occurs whenever "Ctrl+R" is used to reload a page.
To make matters worse, it has been confirmed that this behaviour also affects SSL enabled pages. One thing is that Microsoft has chosen to make a "feature", which reveals this information to "msn.com" and "alexa.com", but the fact that information, which was supposed to be protected by SSL and sent only to one site, is sent in plain text to a third party ("msn.com" and "alexa.com") is of great concern.
The data transmitted to "msn.com" and "alexa.com" is the complete URL. In some cases this could contain sensitive information such as username, password, session id, search string, "secret paths", and more.
Ad-aware takes care of it. That and other solutions can be seen by using the Other References link at the bottom of the page.