Ok for Fix this Bug add padding:0; to Formcheck CSS class "l" and "t"
like this :
.fc-tbx .t{
padding:0;
background: url('img/t.png') repeat-x;
height: 16px;
}
.fc-tbx .l{
padding:0;
background: url('img/l.png') repeat-y;
width : 16px;
}
Enjoy
> If somebody use Mootools FrameWorkFormCheck.js and they have got this