simplenews and taxonomy wrapper

I think this is a different issue from http://drupal.org/node/115693, but I'll add to that if is it isn't.

Latest DRUPAL-5 branch of simplenews and category.

The taxonomy data in the node isn't being populated for the _submit and _validate hooks in simple news so when I submit a newsletter node I get:

warning: Invalid argument supplied for foreach() in public_html/sites/all/modules/simplenews/simplenews.module on line 372.

When looking at the node data I have $node->taxonomy but there is no data in it. $node->category has the correct array:

    [taxonomy] => 
    [category] => Array
        (
            [115] => 116
        )

I am assuming this is a wrapper problem, as it should populate the taxonomy data.