theme bug

[STP]

hello,

I got instaled matrice skin, but hardly modified. I got bug, which you can see on picture. Probalbly center collum has to be defined diffident way.

h1#logo {float:left; background:none;} 
#header {width:890px; margin:auto;}
#top {padding-top:1em; height:100px;  margin:0em auto 0em auto; padding:0em 2em 0 2em; width:890px; background:url('../img/header.png') bottom no-repeat;}

#left_column, #right_column {float:left;}
#left_column {clear:left; width:193px; margin-top:2em}

#right_column {background: white; clear:both; margin: 0em -2em 0em -2em; padding:0em 0em 0 2em;}
#right_column ul { width:912px}
#right_column div {margin:1em 0 0 0}
#right_column h5 a:hover {text-decoration:underline}

#center_column {width:890px; margin:auto; min-height: 1250px; padding:1em 2em 0 2em; background:white;}

div.cms {width:670px; margin-top:0.6em; float:right; padding-bottom:2em}

thanx for help.