My page consists of a left "navbar" div and a right "More Info" div, with a center main section div divided by two columns also divs that span almost the whole center section except for some margins. The problem is that the content of the two columns flickers as I expand the browser. First one column dissappears and then the other, alternating as the browser gets larger. Now not everthing dissappears. One or two spans will be there and in the right position, and the overall size of the column is correct as indicated by the right amount of area covered by its distinctive background cover. Same with the other column. These two columns expand along with their parent center section as all three have their width's spec'd in percentages. Any thoughts?