Select form problem

    <install><![CDATA[
            $forum_db->add_field('users', 'airagh_ext_avatars', 'TINYINT(1)', false, 1);
            $forum_db->add_field('users', 'airagh_ext_link_color', 'VARCHAR(10)', false, 'Default');
    ]]>
    </install>

    <uninstall><![CDATA[
        $forum_db->drop_field('users', 'airagh_ext_avatars');
        $forum_db->drop_field('users', 'airagh_ext_link_color');
    ]]>
    </uninstall>
    <hooks>
        <hook id="pf_change_details_settings_email_fieldset_end"><![CDATA[
            if (file_exists($ext_info['path'].'/lang/'.$forum_user['language'].'/'.$ext_info['id'].'.php'))
                include $ext_info['path'].'/lang/'.$forum_user['language'].'/'.$ext_info['id'].'.php';
            else
                include $ext_info['path'].'/lang/English/'.$ext_info['id'].'.php';
            $forum_page['item_count'] = 0;
?>
                <fieldset class="frm-group group<?php echo ++$forum_page['group_count'] ?>">
                    <div class="sf-set set<?php echo ++$forum_page['item_count'] ?>">
                        <div class="sf-box checkbox">
                            <span class="fld-input"><input type="checkbox" id="fld<?php echo ++$forum_page['fld_count'] ?>" name="form[airagh_ext_avatars]" value="1"<?php if ($user['airagh_ext_avatars'] == '1') echo ' checked="checked"' ?> /></span>
                            <label for="fld<?php echo $forum_page['fld_count'] ?>"><span><?php echo $lang_airagh_ext['Display avatars'] ?></span> <?php echo $lang_airagh_ext['Display avatars label'] ?></label>
                        </div>
                        <div class="sf-box select">
                            <label for="fld<?php echo ++$forum_page['fld_count'] ?>"><span><?php echo $lang_airagh_ext['Link colors'] ?></span></label><br />
                            <span class="fld-input">
                                <select id="fld<?php echo $forum_page['fld_count'] ?>" name="form[airagh_ext_link_color]">
                                    <option value="Default" <?php if($user['airagh_ext_link_color']=='Default') echo("selected=\"selected\"") ?>><?php echo $lang_airagh_ext['Default'] ?></option>
                                    <option value="Black" <?php if($user['airagh_ext_link_color']=='Black') echo("selected=\"selected\"") ?>><?php echo $lang_airagh_ext['Black'] ?></option>
                                </select>
                            </span>
                        </div>
                    </div>
                </fieldset>
<?php
        ]]></hook>
        <hook id="pf_change_details_settings_validation"><![CDATA[
            $form['airagh_ext_avatars'] = (!isset($_POST['form']['airagh_ext_avatars']) || $_POST['form']['airagh_ext_avatars'] != '1') ? '0' : '1';
            if (isset($form['airagh_ext_link_color']))
            {
                $form['airagh_ext_link_color'] = preg_replace('#[\.\\\/]#', '', $form['airagh_ext_link_color']);
            }
            ]]></hook>