CSS FB seems to have inserted the following code within the select list code.
<label class="radioSublabel_Narrow" for="Insurance_group_Form_DD_Signed__1" onblur="hideServerError('Insurance_group_Form_DD_Signed__1_ServerError');">
Yes
<input type="radio" name="Insurance_group_Form_DD_Signed" id="Insurance_group_Form_DD_Signed__1" value="1" class="formRadioField_Standard" <?php if (!(strcmp((isset($_GET["invalid"])?ValidatedField("application8","Insurance_group_Form_DD_Signed"):""),"1"))) {echo "checked=\"checked\"";} ?> tabindex="3" />
</label>
<label class="radioSublabel_Narrow" for="Insurance_group_Form_DD_Signed__2" onblur="hideServerError('Insurance_group_Form_DD_Signed__1_ServerError');">
No
<input type="radio" name="Insurance_group_Form_DD_Signed" id="Insurance_group_Form_DD_Signed__2" value="0" class="formRadioField_Standard" <?php if (!(strcmp((isset($_GET["invalid"])?ValidatedField("application8","Insurance_group_Form_DD_Signed"):""),"0"))) {echo "checked=\"checked\"";} ?> tabindex="4" />
</label>
I have removed it and everything seems to work OK, but it is a pain to have to change it every time I change the form using the wizard.