That extra css still did not do the trick. I think there is something that we did not set correctly in the theme options.
Here is a list of some of our existing options :
Header style : logo left
Menu description : checked on
Height Submenu Element : 20
Logo height : 30
Logo Alignment : 14
Logo Alignment Bottom : 13
Any ideas of these settings are correct ? Or perhaps other settings that should be looked at ?