This is the website I am working on: www.datawebcoder.com
If I open it with firefox, the login part and "welcome" part will move to top. if I refresh the page, or even resize the page, those two parts will back to normal.
Enclose img and sub header into a seperate div (for example #header) and set height to that div for ex, #header{ height: 139px; /***img height 114px + navi height 25px **/ }