table.spamcontrole {
    margin-bottom: 0.5em;
}

table.spamcontrole th,
table.spamcontrole td {
    width: 1.5em;
    border: 1px solid #000000;
    text-align: center;
    padding: 0.25em 0;
}

div.spam_control label {
    float: none;
}