CCK fields are not populated when creating a translation

Hi !

I created an 'mini event' CCK type, with 2 date fields and 2 text fields.
When I create a translation from english to french, the fields are not filled with the source english values (as they are with a regular node translation).

The problem seems to be in translation module, in the 'translation_node_populate_fields' function:

At the line 186 :
$node->$key = $form[$key]['#default_value'] = $source->$key;
For a regular field, $source->$key is a text value.
For a CCK field, it is an array,for instance :

field_description:
Array
(
    [0] => Array
        (
            [value] => Description content
        )
)

Could anyone give me some guidelines to add this feature ?
Must I use a module_invoke on some CCK functions ?
I took a look at the CCK's hook_form and it seems to invoke 'fieldtype_widget' function to get the fieldtype's $form.

Thanks in advance !