The design of my website is such that I have a menu bar which abuts a border. I have tested the website on multiple computers both mac and PC and on every computer is has appeared as I want it to, within the border. I looked at the site on another mac yesterday and the menu bar extended over the border. Why is this that a menu bar would appear different on different computers? It does not make sense to me that it would look like it should on most computers but not right on some? How can I fix this?
(the problem is: the bar extends over the blue border to the right slightly. So the y in biography is not contained within the blue but beyond it)