Have you tried to define the height as well in your code?
Sorry that didn’t help you. If there was a way I could see your complete stylesheet I could be more of service so I’m afraid I’m only forced to guess as to what could be the issue. You say the search box is there, but no search box magnifying glass? Other than that the search box is functional?
Maybe try setting it to display: block; will work?
Try that and let me know your result.
