Additional URL parameters break me page handling

The module attaches, through hook_menu_alter, two additional parameters to page arguments: the original page callback and url components. These arguments are consumed by me_handler() through the following code:

$parts = array_pop($args);
$callback = array_pop($args);

This is usually ok. However, what I think we're not considering is the cases when url provides additional arguments. For example, if we try to access user/%/edit/subscriptions, and this is not a registered path, 'subscriptions' is dynamically added as an additional argument for the page. In that case, the code above obviously fails.