[Ovillo] anchura formulario

[Andres]

No consigo que la anchura del formulario sea igual en Explorer que en 
Firefox y Opera. ¿Cual es el problema?.

ENLACE: http://www.arkitera.es/web/contacto/contacto.htm

HTML:

<div class="form">
  <form id="myform" class="cssform" action="">

<p>
<label for="user">Nombre</label>
<input type="text" id="user" value="" />
</p>

<p>
<label for="emailaddress">Correo electrónico:</label>
<input type="text" id="emailaddress" value="" />
</p>

<p>
<label for="comments">Asunto:</label>
<input type="radio" name="hobby"/>
M&aacute;s información sobre un proyecto<br />
<input type="radio" name="hobby" class="threepxfix" />
M&aacute;s informacion sobre un socio <br />
<input type="radio" name="hobby" class="threepxfix" /> Visitar un edificio 
<br />
<input type="radio" name="hobby" class="threepxfix" /> Concertar una cita 
<br />
</p>

<p>
<label for="comments">Comentarios:</label>
<textarea name="textarea" cols="25" rows="5" id="comments"></textarea>
</p>

<div style="margin-left: 150px;">
  <input type="submit" value="Submit" /> <input type="reset" value="reset" 
/>
</div>
</form>
</div>
<div id="foto_contacto">
<img src="estudio2.jpg" alt="Foto del estudio" />
</div>

CSS:

form{
 float:left;
 margin-left:37px;
}

cssform p{
width: 425px;
clear: left;
margin: 0;
padding: 5px 0 8px 0;
padding-left: 150px; /*width of left column containing the label elements*/
border-top: 1px dashed gray;
}

cssform label{
font-weight: bold;
float: left;
margin-left: -150px; /*width of left column*/
width: 145px; /*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: 
http://www.positioniseverything.net/explorer/threepxtest.html
*/

* html .threepxfix{
margin-left: 3px;
}

#foto_contacto{
padding-left:15px;
float:left;
}

#foto_contacto img{
width:449px;
}