Fatal error when activating Acidfree menu modules.

Seems some function call is deprecated.
Fatal error: Call to undefined function _album_generate_nav_links() in C:\path-to\drupal\modules\acidfree\acidfree.module on line 660
when activating the nav module.

I haven't been looking deep in the structure of the module, but this seems to sort out the problem.
maybe it's completely wrong, so I'm only posting as a comment, not as a patch.

replace
$block['content'] = _album_generate_nav_links($term);
with
$block['content'] = _album_create_links($term);
at line 660 in acidfree.module