The script which works fine on Apache 1.3 is:
<?
if($FormMapField['Submit'])
          {
                print_r ($_POST);
          }
?>
<TABLE BORDER=1>
<form method=post action="">
        <TR>
                <TD>
                                vikas
                </TD>
        <TD>
                <select name=ProfMapField[]>
                        <option>FldFirstName</option>
                </select>
        </TD>
        </TR>

        <TR>
                <TD>
                        hello@hotmail.com
                </TD>
        <TD>
                <select name=ProfMapField[]>
                        <option>FldFirstName</option>
                </select>
        </TD>
        </TR>
        <input  type=submit name=FormMapField[Submit] value=MappedFields> </form> </table>


But on Apache2 this script gives the erroroneous output of:

Array ( [ProfMapField] => Array ( [0] => FldFirstName [1] => FldFirstName [2] => FldFirstName ) [FormMapField] => Array ( [Submit] => MappedFields ) )

The output ProfMapField has 3 indices, Though it is supposed to have only 2 indices.