I am unable to properly logout form myheritage... when I click logout, the login page appears, but if I enter url of my family tree page I am still logged in - tried in FF, IE and Chrome.
Probably cookies are not cleaned properly since when I disable them I can logout.
In order to logout completely, you need to close the browser (IE, or Firefox or Chrome) after the logoff
after you close the browser and open it again - it will ask you fro user and password.
please let me know if it worked for you.