Ayuda Css - Error Margin? Padding?

[lickybuay]

Acá va index.css

#contenedor_info_index {
/*width: 720px;*/
width: 720px;
/* margin-bottom: 20px;*/
margin-top: 44px;
padding-left: 20px;
padding-right: 20px;
height: 385px;
background-image: url(../gfx/footer_index.gif);
background-position: bottom;
background-repeat: no-repeat;
}
#columna1{
width:270px;
float:left;
}
#columna2{
width:190px;
float:left;
margin: 0px;
height: 320px;
}
#columna2 a, a:link, a:visited, a:hover{
float:left;
margin: 0px;
}
#columna2 img{
/*float:left;*/
margin: 0px;
}
#columna3{
/*width:260px;*/
width:240px;
float:left;
height: 320px;
padding-left: 20px;
}
#bienvenidos{
width: 270px;
height: 136px;
float:left;
}
#bienvenidos p{
margin: 0px;
margin-top: 20px;
line-height: 18px;
color: #444444;
font-size: 11px;
}
#bienvenidos a:link, a:active, a:visited{
text-decoration: none;
color: #444444;
font-family: Tahoma;
font-size: 11px;
float: right;
}
#bienvenidos a:hover{
text-decoration: underline;
color: #444444;
font-family: Tahoma;
font-size: 11px;
float: right;
font-weight: bold;
}
#nuestros_trabajos{
width: 270px;
height: 136px;
float:left;
}
#nuestros_trabajos p{
margin: 0px;
margin-top: 15px;
margin-bottom: 15px;
/*line-height: 18px;*/
color: #444444;
font-size: 11px;
}
#nuestros_trabajos a:link, a:active, a:visited{
text-decoration: none;
color: #444444;
font-family: Tahoma;
font-size: 11px;
float: right;
}
#nuestros_trabajos a:hover{
text-decoration: underline;
color: #444444;
font-family: Tahoma;
font-size: 11px;
float: right;
font-weight: bold;
}
.trabajos{
width: 270px;
float:left;
}
.planes_hosting{
width: 240px;
height: 136px;
background-image: url(../gfx/server_hosting_fondo.gif);
background-repeat: no-repeat;
}
.planes_hosting img{
margin: 0px;
margin-top: 10px;
margin-left: 10px;
float: left;
}
.planes_hosting p{
line-height: 18px;
margin: 0px;
/*margin-left: 20px;*/
}