imagefield fields not being passed through theme_field()?

I've done the default phptemplate override function and was trying to access my image fields, but it seems they aren't being passed through the way other standard fields are. Doing a dprint_r() I only get the info on the teaser, body, other text fields but no access to imagefield fields. Any thoughts on how to properly pass them through?

function phptemplate_field(&$node, &$field, &$items, $teaser, $page) {
  dprint_r($field);
  ...
}