content in header blocks "site name"

the problem is more general than previously thought

in IE the sitename is obstructed without even having anything in the header
take a look at new screenshot

the

#wrapper{
    line-height: 1.333em; /* 12px x 1.333 = 16px */
}

creates this

so one can either erase it or put the following in style.css

h1#site-name a{	
	line-height:1em;
}