This applies to cake_1.2.0.7296-rc2. Your line number (and mileage) may vary. Use this modification if you would like to add a space or two of separation between the Date and Time <select>s in all apps generated from your Cake install. Navigate to line 1476 in the file
cake/libs/view/helpers/form.php and change this line:
$opt = implode($separator, $selects);
To this:
$opt = implode($separator, $selects) . ' ';
Add as many spaces or characters as you see fit.