Multiple values field display only last color

Hi!
When you set a CCK field with multiple values, only the last one is displayed. The HTML output display all the divs but all of them share the same ID.

Example:

  <div class="field-items">
    <div class="field-item even">
      <div id="jquery_colorpicker_color_display_37">
        &nbsp;
      </div>
    </div>
    <div class="field-item odd">
      <div id="jquery_colorpicker_color_display_37">
        &nbsp;
      </div>
    </div>
    <div class="field-item even">
      <div id="jquery_colorpicker_color_display_37">
        &nbsp;
      </div>
    </div>
  </div>

and the CSS is:

#jquery_colorpicker_color_display_37 {
    background-color: #50B54B;
}
#jquery_colorpicker_color_display_37 {
    background-color: #8A1D8A;
}
#jquery_colorpicker_color_display_37 {
    background-color: #FFAE00;
}

The fix is simple, just substitute $instance['id'] with $item['jquery_colorpicker'] in the jquery_colorpicker_field_formatter_view() function.