grazie claudio stasera provo.
si tratta del double margin vero?

grazie per la risposta
il sito è isoladisantantioco.it( non posso mettere il protocollo )
ma dove dovrei settare un margin-right:-3px solo per IE6? in col1 o col2?

Ho un problema di visualizzazione solo con IE6.( IE 7,Mozilla,Safari ok)
La colonna di destra non s'affianca alla colonna principale ma slitta sotto.
Si verifica con IE 6 soltanto.
So che è bug riconosciuto in IE6 ho provato ad aggiungere pure display inline e overflow hidden come suggerivano alcuni ma persiste lo stesso problema.
Qualcuno sa darmi una indicazione e un'aiuto.

css-------------------------------------------------------------------------
/* CSS Document /
<style>
/ Clear fix */
.clearfix:after {
content: ".";
display: block;
height: 0;
clear: both;
visibility: hidden;
}
.clearfix {display: inline-block;}

• html .clearfix {height: 1%;}
  .clearfix {display: block;}

#wrapper { background: #fff; width: 750px; margin: 200px auto 0 auto; padding: 10px 0;overflow:hidden;

}
#header { background:; margin: 0 10px;display:inline }
#main { margin: 10px 0; }
#col1 {
background:;
float:left;
width: 480px;
margin: 0 10px 0 10px;
font-family: Verdana, Arial, Helvetica, sans-serif;
color: #4C4C4C;
font-size: 0.8em;
line-height: 2em;
overflow:hidden;
display:inline;
}
#col2 {
float:left;
width: 240px;
margin: 0 10px 0 0;
background-color: #FFFFFF;
display: inline;

}
#footer {
clear:both;
background-image: url(footer.gif);
background-repeat: no-repeat;
background-position: center bottom;
height: 200px;
margin-top: 0;
margin-right: 10px;
margin-bottom: 0;
margin-left: 10px;

}
body {
background-color: #DFDBD3;
background-image: url(background-isola-v2.png);
background-repeat: no-repeat;
background-position: center top;
}

#Titolo {
background-image: url(nav_res.gif);
background-repeat: no-repeat;
background-position: left top;
font-family: verdana, sans-serif;
width: 250px;
height: 20px;
margin-top: 10px;
}
#TITOLO01 {
background-image: url(nav_res_2.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;
}
#maratonarte {
background-image: url(nav_res_8.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;
margin-bottom: 15px;
}
#casavacanza {
background-image: url(nav_res_11.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;
margin-bottom: 15px;
}
#fotovacanza {
background-image: url(nav_res_14.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;
margin-bottom: 15px;
}
/Menu/

.urbangreymenu{
width: 190px;
margin-top: 20px;
}

.urbangreymenu .headerbar{
font: bold 13px Verdana;
color: white;
background: #606060 url(media/arrowstop.gif) no-repeat 8px 6px; /last 2 values are the x and y coordinates of bullet image/
margin-bottom: 0; /bottom spacing between header and rest of content/
text-transform: uppercase;
padding: 7px 0 7px 31px; /31px is left indentation of header text/
}

.urbangreymenu ul{
list-style-type: none;
margin: 0;
padding: 0;
margin-bottom: 0; /bottom spacing between each UL and rest of content/
}

.urbangreymenu ul li{
padding-bottom: 2px; /bottom spacing between menu items/
}

.urbangreymenu ul li a{
font: normal 12px Arial;
color: #000000;
background: #E9E9E9;
display: block;
padding: 5px 0;
line-height: 17px;
padding-left: 8px; /link text is indented 8px/
text-decoration: none;
}

.urbangreymenu ul li a:visited{
color: black;
}

.urbangreymenu ul li a:hover{ /hover state CSS/
color: white;
background-color: #005B9A;
}
</style>
.01 {
background-image: url(nav_res.gif);
background-repeat: no-repeat;
background-position: left top;
font-family: verdana, sans-serif;
width: 250px;
height: 20px;
margin-top: 10px;
}
#TITOLO02 {
background-image: url(nav_res_3.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;

}
.titolotext {
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 0.8em;
line-height: 2.0em;
padding-top: 25px;
border-bottom-width: 0.1em;
border-bottom-style: dotted;
}
#TITOLO04 {
background-image: url(nav_res_4.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;
}
#titolostoria {
background-image: url(nav_res_5.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
}
#titolocultura {
background-image: url(nav_res_7.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 10px;
margin-bottom: 10px;
}
#titoloarcheo {
background-image: url(nav_res_6.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;
margin-bottom: 10px;
}
#titoloambiente {
background-image: url(nav_res_9.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;
margin-bottom: 10px;
}
#titolocasa {
background-image: url(nav_res_10.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;
margin-bottom: 10px;
}
#prenota {
background-image: url(nav_res_12.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;
margin-bottom: 10px;
}
#arrivare {
background-image: url(nav_res_13.gif);
background-repeat: no-repeat;
background-position: left top;
height: 20px;
width: 250px;
margin-top: 15px;
margin-bottom: 10px;
}
/risorse utili/

#navlist
{
padding-left: 0;
margin-left: 5;
width: 200px;
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 0.8em;
}

{
list-style: none;
margin: 0;
padding: 0.25em;
border-top: 1px solid gray;
background-image: url(document.gif);
background-repeat: no-repeat;
background-position:0.5em;
text-indent: 30px;
}

color:;
text-decoration: none;
}
li a:hover {
background-color:;
color:;
}

/menu ad lenco storia/
#navlistoria
{
margin-left: 0;
padding-left: 0;
list-style-image: none;
list-style-type: none;
text-indent: 5px;
}

{
padding-left: 10px;
background-repeat: no-repeat;
background-position: 0 0.5em;
background-image: url(icon.gif);
margin-left: 20px;
font-weight: normal;
}

list-style: none;
}
/Drop shadow img/

div.imgcontainer{
float: left;
background: url(dropshadow.jpg) no-repeat bottom right;
margin-right: 10px;
padding-top: 0;
padding-right: 6px;
padding-bottom: 6px;
padding-left: 0;
margin-top: 10px;
margin-bottom: 0px;
}

div.imgcontainer img{
display:block;
position: relative;
top: -5px;
left: -5px;
padding:5px;
background-image: url(Sant%27Antioco:%20Lungomare);
}
/form/
.cssform p{
width: 300px;
clear: left;
padding-left: 155px; /width of left column containing the label elements/
border-top: 1px dashed gray;
height: 5%;
padding-top: 5px;
padding-right: 0;
padding-bottom: 8px;
}

.cssform label{
font-weight: bold;
float: left;
margin-left: -155px; /width of left column/
width: 150px; /width of labels. Should be smaller than left column (155px) to create some right margin/
}

.cssform input[type="text"]{ /width of text boxes. IE6 does not understand this attribute/
width: 180px;
}

.cssform textarea{
width: 250px;
height: 150px;
}

/*.threepxfix class below:
Targets IE6- ONLY. Adds 3 pixel indent for multi-line form contents.
to account for 3 pixel bug:
*/

• html .threepxfix{
  margin-left: 3px;
  }
  /css thumbnails gallery/
  ul#minipics{margin:0;padding:0;list-style-type:none}

ul#minipics li{float: left;margin: 20px;padding: 0 6px 6px 0;
background: url(dropshadow.jpg) no-repeat bottom right}

ul#minipics li img{display: block;
position: relative;top: -5px;left: -5px;
border: 1px solid #ccc;border-color: #666;
padding: 5px}
#logo {
margin-top: 100px;
margin-right: 0px;
margin-bottom: 0px;
margin-left: 0px;
background-repeat: no-repeat;
background-position: right;
float: right;
}
#contatore {
margin-top: 430px;
margin-right: 0px;
margin-bottom: 0px;
margin-left: 30px;
}

grazie.