problema charset css

[payens88]

raga dopo aver copiato un codice per il css dei select option, ho sul mio browser Immagine.jpg

quei fastidiosi quadrati grigi che riprendono il simbolo del mio select, vi posto il codice

select {
    padding:3px;
    margin: 0;
    -webkit-border-radius:4px;
    -moz-border-radius:4px;
    border-radius:4px;
    -webkit-box-shadow: 0 3px 0 #ccc, 0 -1px #fff inset;
    -moz-box-shadow: 0 3px 0 #ccc, 0 -1px #fff inset;
    box-shadow: 0 3px 0 #ccc, 0 -1px #fff inset;
    background: #f8f8f8;
    color:#888;
    border:none;
    outline:none;
    display: inline-block;
    -webkit-appearance:none;
    -moz-appearance:none;
    appearance:none;
    cursor:pointer;
}


/* Targetting Webkit browsers only. FF will show the dropdown arrow with so much padding. */
@media screen and (-webkit-min-device-pixel-ratio:0) {
    select {padding-right:18px}
}


label {position:relative}
label:after {
    content:'<>';
    font:11px "Consolas", monospace;
    color:#aaa;
    -webkit-transform:rotate(90deg);
    -moz-transform:rotate(90deg);
    -ms-transform:rotate(90deg);
    transform:rotate(90deg);
    right:8px; top:2px;
    padding:0 0 2px;
    border-bottom:1px solid #ddd;
    position:absolute;
    pointer-events:none;
}
label:before {
    content:'';
    right:6px; top:0px;
    width:20px; height:20px;
    background:#f8f8f8;
    position:absolute;
    pointer-events:none;
    display:block;
}

<label>            <select name="tipo">     
           <option value="sociale">Sociale</option>              
  <option value="linguistico">Liguisitco</option>          
      <option value="psicologico">Psicologico</option>       
     </select>            
</label>

Cosa posso fare?