I found some problems when I develop a new modules. In the backend form, I can’t define a input element of image type to a required-entry, which is the mark of required ,I found the source in lib\Varien\Data\Form\Element\image.php line 67 is
maybe it should be this->addClass(’input-file’); so that we can remain other classes in setting.
I found it all the same both in Magento 1.5 and 1.6 CE.
Is it a bug or not?