Not staying logged out?

There was a thread earlier about a difficulty staying logged out.

My roommate and I use the same laptop for our eccie access. When we log out the screen comes up and says all cookies are erase. Then the other person logs in and it will change itself back randomly. We are not doing page back. It is usually during a refresh process or page change and quite a while after the log out.

This is dangerous due to the fact that we can end up posting under the wrong name and get in trouble for multiple posts

The previous thread said this problem had been resolved?

Is the by chance a way to change the skin or background color? This way it would be noticable when it happens.

Thanks for any help!
If you are using FF just go to Tools - options - Privacy - remove individual cookies and search for eccie then delete them. Or you could just look at the name of who is logged in before you start posting.