Close button isn't placed properly in Firefox

When I tried to mouse over the Close button in Firefox (Windows XP), cursor did not changed to hand, because the clickable anchor is located below the button. I've changed the following row in the CSS file:

#imageData #bottomNavClose{ width: 66px; float: right; padding-bottom: 0.7em;}

to

#imageData #bottomNavClose{ width: 66px; float: right; padding-top: 0.7em;}

and it works now both in FF and IE.